Geometry and drawing lessons often require you to carry a set of compasses and stencils. But how to draw a circle when there are no special tools at hand? Ingenuity and improvised devices come to the rescue!
Even circle with hands
This will require a sheet of paper, a medium hard or soft pencil and a hand. Almost all artists use this method when even circles are needed for a picture.
1. We draw a small circle (animal eyes, details of architecture): the paper is placed on a flat surface, the pencil should be in the hand as in normal writing. Set the hand on the sheet so that it rests on the little finger pad. In this case, the condition must be observed that the sheet must be pressed so that it simultaneously reliably contacts the table and can be rotated around the axis, i.e. little finger. With the second hand, rotate the paper in a circle without moving the hand with the pencil. During rotation, the pencil lead should touch the paper, and after rotation, an even small circle should be obtained.
2. How to draw a circle with a diameter greater than 50mm? You will need the same tools, butThe pencil lead should be soft. The difference from the previous method lies in the setting of the supporting little finger, in this case it must be bent and pressed against the palm of your hand. Also, leaning on the little finger, but without pressing hard on the pencil, they turn the sheet and draw a circle.
3. How to draw a perfect circle of large diameter? The algorithm remains the same, but now the supporting little finger is changed to a protruding bone on the wrist. If it is inconvenient, then you can lean on the sheet with your palm.
The biggest difficulty in the described methods is the ability not to move the hand with the pencil. After 2-3 workouts and choosing the optimal leaf rotation speed, these methods will be as simple as drawing a circle with a compass.
Drawing with a protractor
Resourcefulness can more than compensate for forgetfulness, especially when there is no compass nearby, but there is a protractor. This versatile tool often replaces a regular ruler due to its compactness.
The algorithm "How to draw an even circle with a protractor" consists of 5 steps:
- put a dot on a sheet of paper - the center of the circle;
- attach the protractor to this point with its base (usually there is already a hole in this place on plastic tools);
- circle with a pencil the rounded part of the fixture along the inner or outer circle, this forms a semicircle;
- turn the protractor 180 degrees, repeat the previous procedure;
- remove the protractor and manually connectpencil lines to form a circle.
Drawing with CD and glass
This method is considered the simplest. It is enough to attach the disk to a sheet of paper and circle it in a circle if a large diameter circle is required. It also makes it easy to draw a small circle by tracing around the inside hole of the CD. Teachers are categorically against this method, explaining how to draw a circle using other improvised objects.
For example, a glass can also serve as a substitute for a compass. To do this, the bottom or upper part of the glass is placed on a sheet of paper and circled around it. At the same time, the bottom, like the glass itself, must be dry inside so as not to spoil the pattern. Glasses can be replaced with cans of hairspray, deodorant or shaving foam by tracing their bottoms with a pencil.
Seamstress method
To make a pattern for any item of clothing where rounded parts are required, seamstresses have come up with their own way of how to draw a circle. First, the radius of the future circle is calculated. For example, when measuring the waist, the number 600 mm turned out - this is the circumference. To calculate the radius, a school formula is used: the circumference is divided by 2P.
Accordingly, the radius in the example will be 600/3, 142=100 mm.
Now you need two pencils of the same length. They need to be tied together with a thread so that the distance of the stretched thread between the pencils is 100 mm. One pencil will be the reference. Second penciltake the entire length of the thread. Holding the reference one, draw a line in a circle with the second pencil.
The main thing is to keep the thread taut. You should independently select the speed of rotation of the stylus, and fix the paper on a horizontal surface.
The reference pencil can be replaced with a stationery needle.
