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How to make a rectangular parallelepiped from cardboard step by step. How to glue a parallelepiped from paper

Topic: Development of a rectangular parallelepiped

Goal: to organize students’ activities to perceive, comprehend and master the concept of “development of a rectangular parallelepiped.”

Tasks

Develop an understanding of the development of a rectangular parallelepiped by performing practical tasks with parallelepiped models.

To develop the ability to apply mathematical knowledge in Everyday life based on the production of models of parallelepipeds from developments

Develop analytical and synthetic activity when working with parallelepiped development

Develop speech through justifications and reasoning about one’s activities;

Develop independence in creative activities and self-confidence.

During the classes.

1st org moment

Hello guys! Today you will have an unusual lesson. It is unusual in that many things will be the first time for everyone in this class. We met you for the first time and will work together for the first time. What do you think is needed for us to succeed the first time? I am sure that you have these qualities, and they will help you gain new knowledge in today's mathematics lesson.

2 updating knowledge

Will you need the knowledge that you already have today? Show me your knowledge in your next job.

We are surrounded by many objects. They differ in shape, size, color, material from which they are made,... People are interested in the different qualities of these objects. And mathematicians study not the objects themselves, but their forms. Therefore, they use geometric shapes and bodies to study objects.

(slide)

Name the figures and bodies depicted on the slide that you know

You have models of geometric bodies on your desks. Name them. (cube, beam, cylinder, different in color, size) Distribute them into three groups. By what criteria did you divide these bodies? Which body do you think is the odd one out in this group? (cylinder) Why? (round body) Remove the cylinder. What are the remaining bodies called? (rectangular parallelepipeds) Have you guessed which geometric body we will work with? Today we will work with a rectangular parallelepiped. More precisely, we will learn how to make a parallelepiped. For this we need a scan of a rectangular parallelepiped. What is a “sweep”, how to make it and why it is needed - you will learn during the lesson. The topic of today's lesson is called “Scanning a rectangular parallelepiped.” You have workbooks, write down the topic of the lesson in them.

3 new material

Let's start with the assignments in the notebook.

For task 1, select images of a rectangular parallelepiped. Name the number of the drawing that shows a rectangular parallelepiped.

In task 2, determine which of the objects or parts of them shown in the picture have the shape of a rectangular parallelepiped. (Check on the slide)

You have now shown very good knowledge.

- (the same slide with furniture) name in one word all the objects depicted on the slide? Are all the pieces of furniture here familiar to you? (chest of drawers) Where do people get furniture? Have you ever had to buy furniture? Will you ever buy it? For what?

Today in class we will try to arrange the furniture in new room. Do you think this knowledge will be useful to you in the future? Today we will all practice together, and in the future each of you will do it independently. What furniture will you need in your apartment?

You have now determined that some furniture has the shape (question intonation) ... of a rectangular parallelepiped. This means that in order to obtain a piece of furniture we must make a rectangular parallelepiped. Let's remember the elements of a parallelepiped.

On your desks are models of parallelepipeds made of paper. Take them in your hands. Using them and looking at the screen, do the following: highlight all the edges on your models with color, as on the screen. How many faces are there in total? (6) (at the same time, selected edges appear on the slide different colors). Highlight all the edges on the models in blue (visible edges are highlighted in color on the screen) How many edges does the parallelepiped have? (12) Select all vertices on the models with black color. (similar to the vertices visible on the screen) How many vertices are there? (8)

Let's continue working in notebooks and complete task 3

Well done, you did a good job on this!

Can you make a rectangular parallelepiped yourself? How?

To understand how to properly make a rectangular parallelepiped, we will now unfold it and look at it in expanded form.

Pick up the scissors. Don't forget about safety precautions when working with scissors. Repeat after me, cut your cuboid. (we cut first along the ribs of the upper base, then the side ribs) we unfolded our parallelepiped and we got a “development of a rectangular parallelepiped,” from the word “unfold.” (on the slide scan for clarity: both the drawing and the word) Fold our development back. What did you get? What do you think needs to be done to make a model of a rectangular parallelepiped? Now it's time to learn how to build a sweep. Let's take a closer look at it. What figures does the development consist of? Why? How many are there? Why?

In order to obtain a development, we must first draw it. When making a drawing, we will rely on our development: where on the development are the side, top and bottom bases located? What shape do they form? What is the length of this rectangle? (in stock 4+5+4+5= 18) What is the height of this rectangle? (3) Draw this rectangle in your notebooks. Divide it into four rectangles. Where are the front and back edges located? How tall are they? (5) Draw them. Is your drawing similar to our development? Assemble your pattern again and tell me how you will fasten all the edges together? To do this, you need to make allowances for gluing. (slide with allowances) Pay attention to where they will be. Draw allowances on your drawings. (allowances are made) The drawing is ready, all that remains is to cut and glue the development. I really want to see what you can do as soon as possible.

Making a parallelepiped

4 fastening

Look at these scans. (on the slide) What can you say about them? They are all the same? How are they similar? (number of rectangles and their location) How are they different? (size of rectangles) What will the parallelepipeds made from these developments be like?

After you have made your first developments and you already have an idea of ​​​​how to obtain a rectangular parallelepiped from them, it is time to put the acquired knowledge into practice. It's time for us to furnish the room! Look how beautiful the modern furniture is. (Furniture on the slide) Now you will make your own furniture. If anyone needs help, I will help.

Tasks are written on sheets marked in different colors. The tasks vary in complexity: on sheets with a red mark you need to add allowances to the pattern, cut and glue the pattern; on sheets with a yellow mark you need to cut and glue the finished pattern; on sheets with a green mark you need to glue the scan. Each of you will now choose a task according to your strengths and complete the corresponding task. Draw parallelepipeds using these developments and determine what piece of furniture or household item you will get. We will ask our guests to also work and help us make a chair.

At the heart of the most complex and unusual shapes structures, devices, mechanisms lie elementary geometric figures: cube, prism, pyramid, ball and others. First, learn how to create the most simple figures, and then you can easily master more complex forms.

Many modelers start their journey with paper models. This is due to the availability of the material (finding paper and cardboard is not difficult) and the ease of processing it (no special tools are required).

However, paper also has a number of characteristic features:

  • capricious, fragile material
  • requires high accuracy, attentiveness, and perseverance when working

For these reasons, paper is a material for both beginners and real masters, and models of varying complexity are created from it.

In this article we will study the simplest geometric shapes that can be made from paper.

You will need the following materials:

  • paper
  • pencil
  • ruler
  • eraser
  • scissors
  • PVA glue or glue stick
  • glue brush, preferably with stiff bristles
  • compass (for some figures)

How to make a cube out of paper?

Cube – regular polyhedron, each face of which is a square

Creating a cube consists of two stages: creating a flat pattern and gluing. figures. To create a diagram, you can use a printer by simply printing ready-made diagram. Or you can draw the development yourself using drawing tools.

Drawing a sweep:

  1. We choose the dimensions of the square - one side of our cube. The piece of paper should be at least 3 sides wide of this square and slightly more than 4 sides long.
  2. We draw four squares along the length of our sheet, which will become the sides of the cube. We draw them strictly on the same line, close to each other.
  3. Above and below any of the squares we draw one of the same squares.
  4. We finish drawing the gluing strips, with the help of which the edges will be connected to each other. Every two edges should be connected by one strip.
  5. The cube is ready!

After drawing, the development is cut out with scissors and glued with PVA. The glue is very thin layer spread evenly with a brush over the gluing surface. We connect the surfaces and fix them in the desired position for a while, using a paper clip or a small weight. The glue takes about 30-40 minutes to set. You can speed up drying by heating, for example, on a radiator. Afterwards we glue the following edges and fix them in the desired position. And so on. This way you will gradually glue all the faces of the cube. Use small amounts of glue!

How to make a cone out of paper?

A cone is a body obtained by combining all rays emanating from one point (the vertex of the cone) and passing through a flat surface.

Drawing a sweep:

  1. Drawing a circle with a compass
  2. We cut out a sector (a part of a circle limited by an arc of a circle and two radii drawn to the ends of this arc) from this circle. The larger the sector you cut, the sharper the end of the cone will be.
  3. Glue the side surface of the cone.
  4. We measure the diameter of the base of the cone. Using a compass, draw a circle on a sheet of paper of the required diameter. We add triangles to glue the base to the side surface. Cut it out.
  5. Glue the base to the side surface.
  6. The cone is ready!

How to make a cylinder out of paper?

A cylinder is a geometric body bounded by a cylindrical surface and two parallel planes intersecting it.

Drawing a sweep:

  1. We draw a rectangle on paper, in which the width is the height of the cylinder, and the length determines the diameter of the future figure. The ratio of the length of the rectangle to the diameter is determined by the expression: L=πD, where L is the length of the rectangle, and D is the diameter of the future cylinder. Substituting the required diameter into the formula, we will find the length of the rectangle that we will draw on paper. We finish drawing small additional triangles that are necessary for gluing the parts.
  2. Draw two circles on paper, the diameter of a cylinder. These will be the top and bottom bases of the cylinder.
  3. We cut out all the details of the future paper cylinder.
  4. Glue the side surface of the cylinder from a rectangle. Let the parts dry. Glue the bottom base. Waiting for it to dry. Glue the top base.
  5. The cylinder is ready!

How to make a parallelepiped from paper?

A parallelepiped is a polyhedron with six faces and each of them is a parallelogram.

Drawing a sweep:

  1. We select the dimensions of the parallelepiped and the angles.
  2. Draw a parallelogram - the base. On each side we draw the sides - parallelograms. From any side we draw the second base. Add strips for gluing. A parallelepiped can be rectangular if the sides are rectangles. If the parallelepiped is not rectangular, then creating a development is a little more difficult. For each parallelogram you need to maintain the required angles.
  3. We cut out the development and glue it together.
  4. The parallelepiped is ready!

How to make a pyramid out of paper?

A pyramid is a polyhedron, the base of which is a polygon, and the remaining faces are triangles having a common vertex.

Drawing a sweep:

  1. We select the dimensions of the pyramid and the number of its faces.
  2. Draw the base - a polyhedron. Depending on the number of faces, it can be a triangle, square, pentagon or other polyhedron.
  3. From one of the sides of the base we draw a triangle, which will be the side. We draw the next triangle so that one side is common with the previous one, and so on. So we draw as many triangles as there are sides in the pyramid. We finish drawing strips for gluing in the right places.
  4. Cut out and glue the shape.
  5. The pyramid is ready!

A parallelepiped is a three-dimensional geometric figure, the base of which is a polygon, and the faces are parallelograms. Many schoolchildren find it difficult to comprehend this concept, much less solve problems involving calculating the area and volume of a parallelepiped. In order to help your child master geometry knowledge, make a model of a figure out of paper with him.

How to make a parallelepiped from white paper

The three-dimensional model is assembled from a stencil, which is easy to make yourself. Prepare: a sheet of A4 paper, pencil, ruler, scissors, glue.

  • Place the sheet in front of you with the wide side (lengthwise). Divide its side part, equal to 21 cm, in half on both sides and draw a line.
  • Let's assume that the height of the edge of the parallelepiped is 10 cm. Measure from the middle from the two edges up and down 5 cm and connect the marks with segments.
  • To form the sides of the figure, put aside on the first and last lines alternately - 8, 5, 8, 5 cm. Connect the lines at the points to each other - you get the edges of a parallelepiped.
  • On the second and third vertical lines, mark 5 cm from their beginning and end (up and down), since our width of one side is 5 cm, and connect the ends of the segments to form a quadrangle.
  • Step back from the outline of the figure 1.5 cm on each side and draw a mark that will indicate places for fastening.

Important: do not go beyond the protruding side rectangles, so as not to accidentally cut them later.

  • Cut out the resulting shape, cut off the corners of the ends of the strips for gluing.
  • Bend the workpiece along the edges, kneading them with your hands. Transfer the base to the other side so that the pencil grid remains inside, and push the basting along the entire surface.
  • Apply glue to the seam allowance on one side. Roll up the shape and, starting from the outermost strip, glue the opposite edge to it, then the top base. Repeat the procedure on the other side and the parallelepiped is ready.


How to make a rectangular parallelepiped from paper - a cube

A cube is also a parallelepiped, only rectangular, the sides of which are squares. It is drawn according to the same scheme as in the first version.

  • Build successively four squares in the horizontal direction and two on the sides of the second along the vertical axis. Draw the valves onto the glue.


  • Cut out the development, crease the edges, apply glue to the allowances and glue the cube.


How to make a parallelepiped from paper using the origami technique

This method is good because to make a figure you only need square sheet paper.

  • Bend the sheet in half on both sides, divide the resulting corners in half so that a blank of folded triangles comes out.


  • Flip the shape 90º. Bend the left and right corners until they touch, pressing the folds with your fingers. Put down the sheet reverse side, repeat the steps.


  • Turn away the folded corners and fold the others, formed from the free ends of the sheet and pointing their apexes towards the folds.


  • Insert the corners into the resulting pockets.


  • Insert a pencil or blow into the hole formed at the bottom of the model, and the figure will gain volume.


A paper parallelepiped can be used not only as a visual aid in geometry. If the figures are made from colored cardboard, they will be useful in children's games, and those made from decorative paper– will help you wrap a gift or souvenir beautifully.

Children begin to study geometry at high school, but the first acquaintance with geometric figures occurs back in early childhood. How to explain to your little one what a parallelepiped is? The baby is unlikely to understand in words. We need visibility. We will tell you how to make a parallelepiped out of paper, and you can put this information to good use.

Complex name - simple figure

How to make a parallelepiped from paper? Its scheme is very simple if you know what it is about we're talking about. WITH early years kids begin to actively explore this world. And all the things surrounding us in space are geometric figures of one kind or another. In order for the baby to understand what a parallelepiped is, he needs to show it clearly. To do this, you can make a figure out of paper.

But before that, let's refresh our memory that a parallelepiped is a prism that consists of parallelograms. To make it more interesting for your baby, use it for modeling colored paper and template.

Necessary materials:

  • paper;
  • sample;
  • glue.

  • Progress does not stand still, and a personal computer is already in every home. And without a global network, people cannot live practically from the cradle. We find a suitable template, set the necessary parameters, and print it.

  • Please note that the template has curves; they will be glued to the main edges of the figure, thereby maintaining its shape.
  • You need to bend the edges of the parallelepiped along the dotted or internal solid lines. You will understand, because everything will work out by itself.
  • Cut out the template and start gluing.
  • We make a fold on each line so that the edges of the parallelepiped are identical and even.
  • Using a brush and regular glue we fix the individual parts of the figure into a single whole.

If you look around, you will see that many objects in your home have the shape of a parallelepiped, for example, a matchbox.

An unusual design option for a figure

How to make a rectangular parallelepiped out of paper? Cutting out the template and gluing the sides of the shape is easy. If you like to spend free time for modeling all sorts of crafts, we offer you an unusual version of a parallelepiped. Its peculiarity is that initially the figure will be flat and unlike a hexagon, but a little air will instantly turn the paper into a real parallelepiped.

Necessary materials:

  • paper;
  • pencil;
  • ruler;
  • scotch;
  • scissors.

Step-by-step description of the creative process:

  • A standard A4 sheet has a rectangular shape. We need to make a blank in the form of a square.
  • First, fold the cut sheet in half. We stamp the fold well.
  • Let's unfold the sheet and bend it in half, only on the other side.

  • We repeat the described steps, bending the square sheet from the corners.
  • This must be done on all four sides.

  • We ended up with a lot of bent lines.
  • We find the top of these lines and fix it with our hands.
  • We bend the remaining lines along the folds made earlier inward. We should get a triangle like this.

  • Rotate the figure 90° and raise the opposite corners.

  • Now we need to turn this shape into an oblong diamond shape.
  • We bend the protruding corners on the right and left sides towards the center. They must touch.
  • Once again, smooth all the folds thoroughly.

  • Let's turn the figure over to the other side and perform similar actions.
  • Now look carefully at the drawing and maximum accuracy repeat folding the corners.

  • If you look closely, there are slits on both sides of the folds - kind of pockets. We put the corners in these pockets.

  • As long as this figure does not look too much like a parallelepiped, it needs to be inflated. To do this, you can use a cocktail straw.
  • Air must be blown through the hole that has formed on one of the faces of the figure.

Cubes - a game from childhood

It's a pity when a child loses his toys. It's even worse if he breaks them. You can help your little one make original paper cubes. Invite your child to color them. And if you use your imagination, you can make from cubes individual parts of a picture, which you need to assemble into a single whole, like a puzzle.

Now you will learn how to make a parallelepiped and a cube out of paper. Many people think that these are the same thing. In fact, the cube is the most common and simplest three-dimensional shape.

Necessary materials:

  • pen or pencil;
  • paper;
  • scissors;
  • ruler;
  • glue.

Step-by-step description of the creative process:

  • Place a piece of paper in front of you.
  • We take a ruler in our hands and begin to draw a straight line at the bottom of the sheet, measuring segments every 7 cm.

  • Choose the height you need and draw a parallel line. In the same way we make segments 7 cm long.
  • We connect opposite points of the segments. We get these squares.

  • From the third rectangle to the left, draw two more: one at the top, the other at the bottom. Simply extend the lines to the end of the sheet.

  • Now each square needs to be folded. If you cannot make pronounced folds with your fingers, you can use a ruler. Don't overdo it or you will tear the paper.

  • Along the folds, the figure folds perfectly into a cube.
  • Let's connect all the sides into a single whole using regular tape.

  • As a result, we got this paper cube.

Geometry rules, expressed in words and formulas that are often difficult to understand. If they are transferred to the sphere of the physical, made visible, schoolchildren will quickly understand all sorts of theorems and axioms. Layouts of geometric shapes made from paper can help with this.

You will need

  • - paper;
  • - ruler;
  • - pencil;
  • - scissors;
  • - glue.

Instructions

1. In order to make a rectangular parallelepiped out of paper, you first need to remember what it is. This figure consists of six faces, and each face is a rectangle. Consequently, the development of the parallelepiped will consist of six rectangles lying in the same plane and united with each other.

2. Decide on your desired body size. Write down the values ​​for its 3 dimensions - length, width and height.

3. Select paper for gluing visual aid. A very thin one will not work - it will warp too much from the glue and quickly fray. The cardboard may be too thick - it will not bend well or crack at the folds. The optimal paper for watercolors will be.

4. Draw a horizontal line on the paper. Its length is equal to the sum of the length and width multiplied by two. From both ends of the line, perpendicularly downwards, lay down segments equal to the height of the rectangular parallelepiped. Between these segments, draw a line equal and parallel to the first horizontal line.

5. From the upper right corner of the resulting rectangle, set aside along the side edge a number of centimeters equal to the width of the figure, and after that a segment equal to the length of the parallelepiped. After this, again the width and length. From these points, draw perpendicular lines (down to the opposite side).

6. From the upper left corner of the universal rectangle, put up the width of the rectangular parallelepiped, from the end of this segment perpendicular to the right - the length, and then perpendicularly down - again the width. Construct the same figure on the opposite side of the rectangle, starting from its lower left vertex.

7. To make gluing the figure easier, valves can be included in the drawing. Draw a tight rectangle 1.5 cm wide to the extreme side edge, cut its upper sides at an angle of 45 degrees. Attach three of the same valves to the parts, the construction of which was described in paragraph 6.

8. Cut out the workpiece and bend it along each drawn line so that the side edges touch, and the upper and lower parts become the “bottom” and “lid” of the parallelepiped. Apply glue to the valves and tuck them inside. Later Once the glue has dried, you can use the visual model.

By showing your child different geometric shapes, you develop his spatial thinking. He begins to learn such concepts as round, rectangular, square, spherical, cubic. Word " parallelepiped“The most difficult thing for a child. In order to master it, you can do this together with him geometric figure. By making it with his own hands, he learns its validity.

You will need

  • – paper (quite thick, but not cardboard, so that it would be easier for the child to handle the craft), preferably thick landscape paper;
  • - scissors;
  • - PVA glue;
  • - ruler;
  • - pencil.

Instructions

1. Everything parallelepiped and there are three components: length, width and height. To begin with, you need on the sheet paper make a so-called “sweep”. To do this, draw rectangles.

2. Draw the first rectangle (1) using the “length” and “width” representations. Possible, length 10 cm, width 3 cm. The result is a 10x3 rectangle.

3. Next, you need to draw two rectangles 2 and 3 at the top and bottom, one side of which will be the same length as rectangle 1, and the width will be equal to the height. Perhaps it will be 5 cm. The result is 10x5 rectangles.

4. Rectangle 4 has one side that is the same length as rectangle 2, and the width is equal to the length of rectangle 1. The result is a 10x3 rectangle.

5. The last rectangles 5 and 6 are identical. They are located on both sides of rectangle 1. Their width is equal to the width of rectangle 1, and their length is equal to the height parallelepiped A. So it's a 3x5 rectangle.

6. Draw 0.5 cm “allowances” for gluing on the rectangles 3, 5 and 6. The development is ready. It is important that all the details be strictly measured and parallel, otherwise the figure will not stick together smoothly and will have a sloppy appearance.

7. Cut out the development. Press the folds with the blunt end of the scissors, then bend. Glue the shape neatly using allowances. Spread them generously so that the figure does not fall apart.

The sphere can be made from paper. This sphere is suitable for a Christmas tree decoration. However, to make a real sphere, paper is not suitable. Let's try to make it from... threads.

You will need

  • Paper, thread, glue, ball.

Instructions

1. Option 1. You need to cut out sixteen identical circles. After this, bend their parts as shown dotted line on the top of the drawing. Then you need to glue the bent parts together. In any place where the triangles are connected, you need to tie a thread (if you plan to hang the sphere somewhere). Such spheres can be used as genuine Christmas decorations, only if you make them from velvet paper. Instead of circles, you can use pentagons. Such spheres look even more exciting, only small-sized toys.

2. Option 2. To make such a sphere you don’t even need glue. Simply cut out three circles from thick paper and mark them as shown at the bottom of the drawing. The 3rd circle is bent in half and inserted into the hole in the second circle. After this, you need to unfold the folded sheet and combine the 2nd and 3rd circles on it. After this, the sheet is bent in the middle, and the edges of the first circle are bent and the 2nd and 3rd circles are inserted into the center of the resulting hole. Later, all the circles unfold.

3. Option 3. Of course, the above options, although primitive in production, are not spheres in the strict sense of the word. If a real sphere is needed, then it can be made from threads. To make a “thread” sphere you will need scissors, a round balloon, a spool of thread, PVA glue and plastic dishes. Glue and water are poured into a plastic container in a ratio of approximately three to one and thoroughly mixed. After this, the balloon is inflated. The threads are unwound and placed in a bowl with diluted glue, where they are kept for five minutes. After the threads are saturated with diluted glue, the ball is carefully wrapped with them. In this case, you need to ensure that the layer of thread is uniform and there are no gaps left. A day later the sphere is ready. Simply remove the ball by piercing it with a needle in advance.

Video on the topic

Many objects around us have the shape of a parallelepiped. Consequently, the rule for constructing this geometric body may be required in the most unexpected situations. Let's say, if you decide to make a box, an animal cage, an aquarium. Or maybe you want to do paper plastic art?

You will need

  • Copper wire with a diameter of 2 mm.
  • Wire cutters
  • Pliers
  • soldering iron
  • solder
  • ruler
  • square

Instructions

1. Determine the parameters of the parallelepiped. You need to know its length, width and height. Mark a piece of wire prepared for the ribs of the future model. Measure and cut 4 pieces equal to the length of the parallelepiped, 4 pieces equal to its width and 4 equal to its height.

2. Take a wire “length” and solder pieces equal to the width on both sides at right angles. Solder the 2nd long piece to the resulting part. It should be perpendicular to the “width” and parallel to the “length”. That's right, make the second base the same way parallelepiped .

3. Place the base of the parallelepiped on the table and solder one of the segments equal to the height to it at a right angle. Do the same on each four corners.

4. Solder the upper plane at right angles to the resulting edges of the side surface. It should be positioned strictly parallel to the lower base.

5. If you need a demonstration model of a parallelepiped for a lesson, then it can be considered complete. If you are making, say, modules for a children’s construction corner, then you need to cover the resulting frame with leather or thick fabric.

Video on the topic

Note!
The choice of material depends on the purpose of the parallelepiped. It is best to take wire from yellow copper, because it is more elastic. You can also use steel wire, but not stainless steel. Aluminum wire is not suitable. It’s better to take a tailor’s metal square. For a model of a non-rectangular parallelepiped, you need to make patterns of the sides and carefully measure all the corners. In this case, the parallelism of the bases will have to be controlled extremely strictly. It is more convenient for everyone to use a metal ruler for this purpose.

Helpful advice
For paper plastic you only need to make a parallelepiped development. It consists of 3 types of rectangles with allowances for gluing. According to the same thesis, the frame of a cage for an animal or an aquarium is made.

To make a postcard or to cover up a torn textbook cover, you need a paper rectangle given dimensions. Make one like this rectangle quite easily using a square.

You will need

  • - paper
  • – square
  • - pencil
  • - scissors

Instructions

1. In order to do rectangle from paper, it must first be drawn. Draw a segment ab on paper equal to one side rectangle A.

2. Attach a square to one side of the segment ab so that the angle of the square coincides with the end of the segment, and, having noted the required length, draw the second side rectangle a, located at right angles to side ab.

3. Attach the square to the other side of the segment ab so that the angle of the square coincides with the other end of the segment, and draw the third side rectangle a, located at right angles to side ab and equal to the 2nd drawn side. To check the correctness of the construction rectangle Oh, measure the second and third drawn sides again - they must be identical in length.

4. Construct the missing fourth side rectangle and, primitively combining the free ends of the last 2 constructed sides. Now built rectangle can be cut with scissors.

Video on the topic

Helpful advice
– when constructing a rectangle, hold the square firmly so that it does not slip; when choosing a square, give preference to a wooden square, because it does not leave marks on the paper

Video on the topic