How to draw a circle with a pencil with a dot in the center. How to draw an even circle without a compass? How to draw a circle freehand

29.06.2020

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

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

visibility 18102 views

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. So that the whole sequence of brain work is clear.)))

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

Let's take it mobile phone, we 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 do not 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 it is 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. Maybe there will be more! Soon you and I will become so wiser that we will take on the most difficult tasks without fear. complex models. 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.

Any circle or smooth circle in Photoshop they are drawn according to the same rules as respectively. By and large, you need to use the same groups of tools, but adjusted for the shape of the figure.

Method 1: Ellipse Tool

Using this tool you can draw a circle or circle shape.

Let's start with the vector, that is, from a figure whose dimensions can be changed without loss of quality. To do this, select Ellipse tool, and in the options bar set the setting Shape layer.

Now draw a circle or circle. But first, choose a primary color other than white, otherwise you won’t see what you ended up drawing.

How to draw an even circle

By default, the circle is drawn as arbitrary, that is, you draw nothing more than an oval with arbitrary dimensions. To draw an even circle, select one of the options:

hold down the Shift key;
On the tool options bar, select the option:

Once again, pay attention to this window with tool parameters. Here you can configure the ability to draw a figure according to specified sizes or proportions. Specify the desired dimensions/proportions in the width and height fields, and then simply click anywhere in the document - Photoshop will immediately display a circle with the specified values.

So, a vector circle or circle has appeared. This will be a solid colored shape layer.

Now, to be able to resize without losing quality, use the Ctrl+T command. When the need for a vector figure is no longer necessary, you can use it to continue working on the figure using all the capabilities of Photoshop.

Raster shape this is done in exactly the same way, but at the very beginning you need to select another option in the options bar - Fill pixels.

After this, the circle will be created immediately as a raster one. Don't forget for her.

Method 2. Stroke the selected area - ring

Let's turn to another Photoshop tool - Oval area. The action plan is as follows: create a round selected area, and then outline its borders. As a result, we get a ring.

Draw a circle free form or an even circle (with the Shift key held down). You can also specify specified sizes or proportions for the selection in the tool options bar. To do this, from the drop-down list Style select the appropriate option. After this, the width and height fields will become active and you can enter the required numbers there.

Let's say we get a selected area like this:

Now you need to outline its borders. To do this, select the command: Editing - Stroke.

A new window will appear in which you specify the width of the stroke border and its color. There are also interesting settings on how the stroke width will be calculated:

Inside- this means the frame will lie on inside selected area;
Centered- this means the frame will be divided equally into the part that runs inside the selection and the part on the outside;
Outside- this means the frame will go around the dotted line of the selection.

Keep this in mind. that the chosen option will affect the final dimensions of the circle (its width and height).

Now that the settings are entered, click OK. All that remains is to remove the dotted selection line - Ctrl+D.

If you notice an error in the text, select it and press Ctrl + Enter. Thank you!

Knowing how to create a circle is not a life skill. And yet, sometimes you need to know how to draw a circle when you don’t have a compass or some kind of round object at hand. Therefore, methods for drawing different circles will be proposed below.

An even circle - what to do if there is no compass

It is useful for everyone to know how to draw a circle without a compass. Usually this item is not at hand. A student who has left the necessary drawing tools at home and has a scheduled lesson may find himself in this situation. Or an adult who, for some reason, urgently needs to draw an even circle. What to do in these situations? For example, schoolchildren can replace a missing accessory with a protractor, which is often found in a pencil case. Just attach it to a piece of paper, find the center on the straight part and put a dot. This place is considered the center of the circle. Then you need to trace a semicircle along the inside, rotate the protractor 90° and carefully draw another third of the circle. After this, repeat the rotation of the tool again and finish drawing the rest of the figure.

If you have not been a student for a long time, which means you do not have a pencil case with drawing tools at hand, then you can correct the situation with the help of a CD. With it it is easy to create a figure as small in size (if you circle inner part disk), and large (if you circle the outer part of the disk). For office workers in a similar situation, a glass used for water will help. Just place it on paper and draw along the bottom contour with a pencil. Thus, we are convinced that it is possible to draw a circle without a compass, using improvised objects for this.

Ways to draw circles without using additional objects

How to draw a circle if you don’t have drawing tools and other auxiliary things at hand? Everything is not as complicated as it seems at first glance. Place and fix one hand on the paper, while making sure that the little finger is the center of the planned circle. Twist the sheet with your other hand and see what happens. smooth circle. Draw a pencil along the resulting contour. To draw a circle with a larger diameter, you need to bend your little finger, as if you are trying to clench a fist. Next, the procedure is repeated, as with a smaller circle, twist the sheet and draw the boundaries of the circle. If you need to create an even larger circle, then position your hand so that it touches the wrist bone to the sheet. It is recommended to use soft pencils for drawing circles.

These methods are considered easy and simple. They help out when you don't have a compass at hand. The main thing is to be able to hold your hand straight and so that it does not move.

Draw a circle using a ruler

For those who have a ruler at hand, the following method of creating a circle will be useful. You need to attach a ruler to a sheet of paper; at this point there will be the center of the circle. Place another mark next to the number indicating the radius. Then you need to put the third point; to do this, slightly move the edge of the drawing tool, but so that the 0th mark remains in place, and place a notch above the second mark.

Repeat these steps until you end up with a circle. It will consist of dotted lines. The more small lines there are, the easier it is to draw a straight line. This easy way, but quite long.

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.

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. So that the whole sequence of brain work is 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.

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.

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 an even circle without a compass?

You can take a pin. Tie a thread to it on one side, and on the other, tie a pencil at the required distance (radius). Place the pin in the center of the future circle. And holding the pencil strictly vertically, draw a circle. In this way you can draw fairly large circles.

When I was at school and when I didn’t always have a compass at hand, I often resorted to simple way. He took a pencil and, for example, a pen that does not write and will not leave a dot in the center of the circle, in one hand, squeezed it approximately the way the Chinese hold chopsticks when eating, and simply rotated a sheet of paper or notebook. The result was an almost perfect circle. Maybe that’s why, when I picked up chopsticks for the first time, they told me that I had been using them all my life anyway. Here's the story.

The easiest way to draw a circle is using any round-shaped object. for example plates, coins and so on, you just need to circle this item. You can also use a stencil and find a circle of the diameter you need.

But when my compass broke, and there was nowhere to get it in the evening, but I needed to build, I took a simple pencil, drew serifs on the nm with a pin, as if depicting a radius. And I went to draw from the intended center at certain intervals of about 10-15 degrees , and putting down points, at the end of the radius pencil there will be points on the circle. And how many there will be, how much patience you have. It helped so as not to grab a couple, the circle was drawn, and the problem was solved. Why didn’t you use round glasses? They were too big for a notebook, but There were no such coins; 5 kopecks were too small.

Without a compass, a circle can be drawn evenly using some round object; a glass, mug, tube of cream, etc. are suitable for this.

You can also take paper or cardboard, fold it 4 times and cut a semicircle around the edge. When you unfold the paper, you will get a circle. Circle it and that's it.

There are several options: you can find some object with a round bottom (a cap from a pill, nasal drops) and trace it around the bottom with a pencil. You can take a ruler, make the center of a circle and measure even distances from this center, then connect the dots.

It depends on how big you need to draw a circle.

If it’s small, then a coin, button, or tablet will do.

If it is larger, then you will need a glass, plate, pan, lid, cream jar.

You can also use a pushpin, to which you tie a thread of the required length and a pencil or chalk to the other end of the thread. Stick the button into a sheet of paper and draw - you will get an even circle if the thread tension is uniform.

Use something round of suitable diameter, a saucer, a mug, or another object on which you can draw a circle. Well, circle this item accordingly. That's how it works straight line. Only in this case, if the diameter is important, then it may be difficult to select an item. There are also special rulers-patterns. There are usually several circles of different diameters. If you have such rulers, you can use them.

And I usually take into account the cells from a math notebook, adhere to even symmetry, etch the dots, and then smoothly draw a circle along them, they always used to draw like that at school...)) Didn’t you draw like that yourself?..)

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 are at a meeting or at your workplace, but don’t have it at hand the right tool, 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.

Circle larger size is drawn in the same way, but in this case bend your little finger, as if you clenched 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 most simple methods how to draw a circle without a compass. The most important thing in these methods is to learn to hold 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 in the right place. Draw a second point near 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 dotted line. 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.