Care should be taken when using the compass

When using the compass, pay attention to:

1. The fixed compass pin cannot be moved.
2. Once the radius when drawing the circle is determined, the distance between the two feet of the compass can no longer be changed.
3. The stitch is sharp, be careful not to hurt your hands when using it.
4. During the process of drawing the circle, the compass should be slightly tilted by about 30 degrees to make the line of the drawn circle smooth.
5. The height between the feet of the compass should be the same.
A circle is a geometric figure. By definition, circles are usually drawn with a compass.
The diameter and radius length of the inner circle of the same circle are always the same, and the circle has an infinite number of radii and an infinite number of diameters. A circle is an axisymmetric, center-symmetrical figure. The axis of symmetry is the line on which the diameter lies. At the same time, circles are "regular infinite polygons", and "infinity" is just a concept. When a polygon has more sides, its shape, perimeter, and area are closer to the circle. So, there are no real circles in the world, circles are actually just conceptual figures.

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Other ways to draw circles:
1. Draw circles with your fingers. With the thumb as the center of the circle, and the distance between the index finger and the thumb as the radius, the shape formed by rotating around is a circle.
2. Press one end of the rope at the center of the circle, straighten the rope, draw along the center of the circle, pay attention to keep the pen body vertical.
3. Another method is to tie a pencil at each end of the rope, fix one in the center of the circle, and draw the other around the center of the circle.