How to draw an even circle by hand. Simple geometric shapes

HOW TO CALCULATE THE RADIUS OF A CIRCLE.

What is it for, this radius calculation? To draw a circle, we need to know radius this circle - that is, the distance from one leg of the compass to the other.

Let’s say we need to draw the circumference of the bottom of a Panama hat, and all we know is the circumference of the child’s head. How wide should the legs of the compass be spread in order to ultimately obtain a circumference that matches the size of the baby’s head?

Or we need to draw the circumference of a circle skirt, knowing only that the circumference should perfectly match the circumference of our waist.

Now, so that everything is extremely clear and understandable, Let's look at 2 specific cases that are most often encountered in the work of seamstresses.

This is the calculation of the radius of the bottom of a Panama hat. And calculation of the radius on the circle skirt pattern.

So, let's go...

I beautifully painted this story in pictures directly with the text-reasoning. To make the whole sequence of brain work clear.)))

Means, to find out the radius, we need to divide our circumference of the baby’s head by 6.28.

We take a mobile phone, find a calculator in it and divide our 42 cm head circumference by 6.28 - we get 6.68 cm = that is, 6 cm and 6 mm. This is the radius.

This means that we need to move the legs of the compass apart to a distance of 6 cm 6 mm. And then the circle we drew will be equal to 42 cm - that is, it will lie evenly on the child’s head (just don’t forget to weigh it down by retreating 1 cm for seam allowances).

Situation two - you need to draw the circle of the circle skirt. All we know is the waist circumference and the length of the skirt that we ultimately want to get.

In the drawing of the sun skirt there are 2 circles. The small one (inner) should lie flat on our waist. That is, the length of this circumference should coincide with the waist circumference. The waist circumference is 70 cm, which means the circumference should be 70 cm (well, maybe there are all sorts of centimeters here and there in the form of a seam allowance, or some other additional trim in the form of a belt or yoke)

This means we need to find out what radius to draw the circle so that the resulting circle is the length we need 70 cm.

In the picture below I have described everything and how to calculate the radius of a small circle and how to then find out the radius of a large circle.

And when a small circle is drawn. All we need is to add the desired length of the skirt to the small radius - and we get a large radius for the large circumference of the skirt edge.

Now we've sorted out the calculations. We will sew skirts and hats - I will send you to this article.

Now let's figure out how to draw a circle of any size without a compass.

HOW TO DRAW A CIRCLE WITHOUT COMPASSES.

Here below I have illustrated three methods with three pictures. I hope that everything is clearly drawn and written.

Yes, this is a quick way - but you need to make sure that the pencils do not move to the side. We change the angle of the pencil's radius. Or it is necessary for one person to hold one pencil exactly, and the other to draw exactly perpendicularly with a second pencil.

In general, the lower the thread is tied, the more accurate the circle will be. That's why some people use small pins. The error when the pin is tilted to the side is small, and can be neglected when sewing.

And yet, the surest way to draw an exact circle without a compass is with the help of an ordinary ruler and pencil. This is what it looks like:

And then in a circle, we move the centimeter (like the hour hand on a watch) and mark points at the same distance - that is, on the same number on the centimeter tape. Instead of tape, you can use string with a mark on it - the main thing is to make sure that the string does not stretch at all.

Well, that’s all - another gap in knowledge has been eliminated - now you can swing both a circle skirt and a Panama hat - we know how to calculate radii.

Olga Klishevskaya, especially for the “Women’s Conversations” website.

Any line, any stroke must express a certain form in the drawing. Thanks to strokes, lines are drawn, which, in turn, create various figures. Flat shapes have a rectilinear surface characterized by only two dimensions - length and width.

A square is a regular polygon, the axis of which is equal to four sides, and all four angles are right angles. Drawing a square on a small piece of paper with a pencil is not difficult, you just need to have a steady and confident hand. It is much more difficult to gain confidence when drawing a square in a large drawing. In such a case, charcoal is considered the most suitable drawing tool. Having calculated the size of the square, you should draw one of its vertical sides. Now from the top point of this straight line you need to draw a line perpendicular to it of exactly the same length. From the right point of this second line, draw a line perpendicular to it and parallel to the first. And finally, you need to combine the extreme points of two parallel lines.

The diagram below shows two squares, one larger (external), the other smaller (internal). Eight reference points are located on the symmetry axes of the large square. The vertices of the small square are located at a distance of two-thirds of the diagonals of the large square from its center. The vertices of a small square are united by smooth arcs, thereby forming a circle.

1. In order to draw a square, you need to know the length of its side.

2. From the top point of the vertical straight line, draw a line perpendicular to the first and equal in length to it.

3. Repeat the same action, finding the other top point of the square.

4. Finish creating the square by connecting parallel lines.

Rectangle

A rectangle is a regular polygon whose opposite sides are equal and all angles are right angles. When creating a rectangle, you need to perform the same steps as when depicting a square, but taking into account the difference in aspect ratio.

Circle

When creating a drawing, an indispensable tool, without a doubt, is a compass. In drawing, it is extremely important to learn how to draw without it. Until the skill of drawing a circle of the correct shape by hand has been formed, it is permissible to use some available means, for example, patterns or, as an improvised compass, even an ordinary cord. To achieve the goal, you can also mark reference points on two concentric squares.

How to draw a circle by hand

In order to learn how to draw a circle by hand, you should start practicing by creating small circles with a radius of about 5 cm. As a rule, at first the figures turn out to be somewhat oval in shape, then, as you gain practical experience, the circles take on the correct shape. To draw larger circles, it is advisable to mark reference points on two concentric squares or use a string to make the task easier.

It is not recommended to use a compass when creating drawings.

Practical advice: how to draw a circle using a cord

To develop the skill of creating the correct large circle, it is useful to use a cord.

1. With one hand, hold the tip of the cord at the point that will become the center of the circle. In your other hand, hold a piece of chalk and the other end of the cord at a distance that is equal to the radius of the circle.

2. Start drawing an arc from the point that will allow you to make the widest possible movement with the chalk.

3. To complete the circle, pass the hand holding the chalk under the hand holding the cord. At the same time, point your hand with the chalk in the opposite direction.

4. Make sure that the cord is kept at the same distance from the center of the circle, ensure that the beginning of the second semicircle is accurately connected to the end of the first.

The circle is also drawn using patterns. The simplest pattern can be the top of the glass.

For the hardworking - a bright light burns through life, for the lazy - a dim candle

How to calculate the radius and draw a circle without a compass.

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Good afternoon, dear beginning self-taught seamstresses. Today I decided to write an article that will help us in the future to cut children's panama hats, adult beach hats, as well as a circle skirt, and of course flounces. As you guessed, we are talking about the ability to calculate the radius of a circle and be able to draw it without a compass. Because it is quite possible that we will need to draw circles of a size for which compasses are not sold. And not everyone has a compass at home.

So, the following is on the agenda:

• Calculation of the radius of a circle for a Panama hat, flounce and circle skirt.
• Three ways to draw a circle without a compass.

HOW TO CALCULATE THE RADIUS OF A CIRCLE.

What is it for, this radius calculation? To draw a circle, we need to know radius this circle - that is, the distance from one leg of the compass to the other.

Let’s say we need to draw the circumference of the bottom of a Panama hat, and all we know is the circumference of the child’s head. How wide should the legs of the compass be spread in order to ultimately obtain a circumference that matches the size of the baby’s head?

Or we need to draw the circumference of a circle skirt, knowing only that the circumference should perfectly match the circumference of our waist.

Now, so that everything is extremely clear and understandable, Let's look at 2 specific cases that are most often encountered in the work of seamstresses.

This is the calculation of the radius of the bottom of a Panama hat. And calculation of the radius on the circle skirt pattern.

So, let's go...

I beautifully painted this story in pictures directly with the text-reasoning. To make the whole sequence of brain work clear.)))

Means, to find out the radius, we need to divide our circumference of the baby’s head by 6.28.

We take a mobile phone, find a calculator in it and divide our 42 cm head circumference by 6.28 - we get 6.68 cm = that is, 6 cm and 6 mm. This is the radius.

This means that we need to move the legs of the compass apart to a distance of 6 cm 6 mm. And then the circle we drew will be equal to 42 cm - that is, it will lie evenly on the child’s head (just don’t forget to weigh it down by retreating 1 cm for seam allowances).

Situation two - you need to draw the circle of the circle skirt. All we know is the waist circumference and the length of the skirt that we ultimately want to get.

In the drawing of the sun skirt there are 2 circles. The small one (inner) should lie flat on our waist. That is, the length of this circumference should coincide with the waist circumference. The waist circumference is 70 cm, which means the circumference should be 70 cm (well, maybe there are all sorts of centimeters here and there in the form of a seam allowance, or some other additional trim in the form of a belt or yoke)

This means we need to find out what radius to draw the circle so that the resulting circle is the length we need 70 cm.

In the picture below I have described everything and how to calculate the radius of a small circle and how to then find out the radius of a large circle.

And when a small circle is drawn. All we need is to add the desired length of the skirt to the small radius - and we get a large radius for the large circumference of the skirt edge.

Now we've sorted out the calculations. We will sew skirts and hats - I will send you to this article.

Now let's figure out how to draw a circle of any size without a compass.

HOW TO DRAW A CIRCLE WITHOUT COMPASSES.

Here below I have illustrated three methods with three pictures. I hope that everything is clearly drawn and written.

Yes, this is a quick way - but you need to make sure that the pencils do not move to the side. We change the angle of the pencil's radius. Or it is necessary for one person to hold one pencil exactly, and the other to draw exactly perpendicularly with a second pencil.

In general, the lower the thread is tied, the more accurate the circle will be. That's why some people use small pins. The error when the pin is tilted to the side is small, and can be neglected when sewing.

And yet, the surest way to draw an exact circle without a compass is with the help of an ordinary ruler and pencil. This is what it looks like:

And then in a circle, we move the centimeter (like the hour hand on a watch) and mark points at the same distance - that is, on the same number on the centimeter tape. Instead of tape, you can use string with a mark on it - the main thing is to make sure that the string does not stretch at all.

Well, that’s all - another gap in knowledge has been eliminated - now you can swing both a circle skirt and a Panama hat - we know how to calculate radii. It's only the beginning! Soon you and I will become so smart that we will tackle the most complex models without fear. I’ll also tell you about the flounces and the base pattern - yes, we’ll draw you a real adult pattern-base in 30 minutes - and as they say, off we go... we’ll sew everything)))). And not only .

Olga Klishevskaya, especially for the site “Women’s Conversations”.

Article can only be copied to a personal computer or to the pages of a personal online diary WITH MANDATORY SAVING OF ALL LINKS INSIDE THE ARTICLE.

Good day, dear readers. It's been a while since I wrote a tutorial on Photoshop. We need to fix it urgently. Today we’ll talk about one very simple thing that will be useful both for websites and other elements, and just for beautiful pictures and postcards.

Now you will learn how to draw a circle in Photoshop. It's very simple, fast and interesting. I will also show you some interesting options for making your own modern materials for the site, posts for groups on social networks, or just postcards that you won’t be ashamed to send to your friends.

How to draw simple, even and beautiful circles

The first thing you need to do is open Photoshop. Don't forget that you have the opportunity to use the online version pixlr.com .

I never tire of saying that you shouldn’t pay attention to simple (or other) options like Paint or some other nonsense. Learn to work in professional programs.

Now you will read an article about solving one problem, tomorrow about another, and in a year you will be able to complete very cool projects, even if you did not intend to do this at all. Set global goals for yourself. But let's return to the main topic.

Create a new document.

Let's say it will be 500 x 500 pixels in size. It doesn't matter.

Now find the ellipse tool in the control panel. If you can’t find it right away, try holding down the mouse button on the menu buttons on the left for a few seconds. Perhaps the ellipse is hidden under the rectangle.

Now let's draw a circle.

To make the circle even, hold down the shift button on the keyboard. It helps maintain proportions.

Once you're done, an additional control panel will pop out. It duplicates the one at the top of the screen. You can work in whichever one you like best, it doesn’t matter.

If you need to draw a figure of the required diameter, change these values ​​to the necessary parameters. Let it be 500. Look, if for some unknown reason only one indicator changes, do not forget to change the second one, otherwise you will draw an ellipse.

You can use a gradient, a pattern, or choose one color. Open additional panels to expand your capabilities.

Here you can also use different techniques: gradient, pattern, one color or without a stroke.

If you want to change the line itself, look at the next column.

By the way, I completely forgot to say, if you use a gradient for filling, then try a radial effect so that the color comes from the center.

Another interesting effect

You can draw a circle directly on the picture or move it to the photo using the ctrl+c (copy) and ctrl+v (paste) buttons.

Now work with the opacity (in the left panel). Make sure that the layer you are working with is highlighted in the panel. In this case, an ellipse.

You can write some text in the circle.

If you have any difficulties, you can download the psd layout of this picture, which you see in the screenshot above, and dig deeper into it. It's more interesting to learn this way. Understand my example yourself. It's not difficult at all. ( DOWNLOAD >> )

There are layers: a photo of the savannah (background), a circle with a gradient (ellipse 1) and text. If you download this file, you can and should open it using Photoshop, and then have fun as you wish.

Or here is another picture that you can download ( DOWNLOAD >> ).

To create it, in addition to those moments that you already know, on each layer I right-clicked and changed the blending parameters.

Download this layout and see for yourself, maybe you can improve the result significantly! Don't be shy and leave your options in the comments.

For those who want to comprehend

If you like my lessons, then I advise you to subscribe to my blog’s mailing list and receive information about the latest interesting publications directly to your email. It's really convenient.

However, you must admit that in order to learn and become a professional you will have to wait a lot. After all, in addition to Photoshop, I talk about WordPress, how to sell and create websites, about plugins and negotiating with customers.

If you want to learn Photoshop in order to create websites, I can recommend two more options. The first one is lessons from here - “ WEB DESIGN for beginners" I have already written about them in detail. In principle, if you want, you can learn a lot for free, in three days, which are provided as a test period. Very useful and great.

However, this is cool if you study for yourself. If you are interested in making big money, then pay attention to Netology, namely this course - “ Web designer: effective website from idea to implementation »:

Yes, the price, of course, bites.

But what program and what teachers are waiting for you?

Here you have the director of Red Keds, and the creator of interfaces from Kaspersky Lab, and a bunch of other eminent and successful guys from world-famous companies. Upon completion you receive a diploma. This one is really worth a lot.

OK it's all over Now. Now you know the maximum and I can take my leave with peace of mind.

Good luck in job!

Drawing circles of various diameters is far from the most necessary skill in life. However, sooner or later the need to draw a circle without a compass and other round-shaped auxiliary objects takes everyone by surprise. Therefore, it is better to find out in advance without a compass, regardless of its diameter.

How to draw an even circle without using a compass

You can be a schoolchild who came to a geometry lesson, forgetting his drawing tools, a student, an adult forced to draw a perfectly straight circle - different situations happen.

It will be useful for every person to know how to draw an even circle without a compass. We offer you several ways to solve this problem.

A compass can easily be replaced by another tool found in every student’s pencil case, namely a protractor. Place it on paper, marking the central point on the straight part, this will be the center of the future circle. Trace the inside of the semicircle, then rotate the ruler about ninety degrees and draw a third of the circle. Rotate the protractor one more time and complete the circle.

If you're in a meeting or at work and don't have the tool you need on hand, just use the CD. Trace it from the outside or from the inside to get a smaller shape.

In an office setting, you can also use a glass. To do this, take a glass of water, take a sip and place it on a sheet of paper, lightly circle the bottom. Drink some more and set it aside.

All of the above items can be found in any office; the protractor will also be available to students. With their help you can draw a circle evenly without a compass.

Draw circles of different sizes without auxiliary objects

What to do if you need to draw circles of different diameters?

It is not at all difficult to cope with this problem, having only paper and a simple pencil on hand.

Take a pencil in one hand and place the other on a piece of paper. Place the little finger of your first hand on the sheet so that it is the center of the future circle. Hold this position well. With your other hand, start turning the paper around your little finger. You will see how a smooth circle is obtained, just like when using a compass.

A larger circle is drawn in the same way, but in this case bend your little finger, as if you were clenching all your fingers into a fist. With your left hand, start turning the sheet until you see the resulting circle. It is advisable to use a pencil with a soft lead.

A circle with an even larger diameter can be drawn by repeating all the above tips, but now the right hand should touch the sheet with the protruding bone on the wrist.

These are the simplest methods on how to draw a circle without a compass. The most important thing in these methods is to learn to keep your right hand motionless (left if you are left-handed).

How to Draw a Perfect Circle Using a Ruler

If you have a regular ruler on hand, then you can use another tip on how to draw a circle without a compass. Take a ruler and place it on the paper, the "0" mark will be the center of the circle, so place it in the right place. Draw the second point near the digital value corresponding to the radius of the circle. Move the second edge of the ruler slightly so that the middle remains at zero, and the third point is located slightly above the second.

Do this procedure several times. As a result, you should have a circle drawn. The more often the dotted line, the easier it will be to connect everything into a solid line.

This is perhaps the easiest, but at the same time the longest way to draw a circle without a compass.