Compass is a tool for drawing circles or strings in mathematics and drawing, and is often used for drawing with a ruler.
Compasses are usually made of metal and consist of two hinged parts, which can be adjusted.
Compasses are divided into ordinary compasses, spring compasses, point compasses, beam compasses, old compasses, mechanical pencil compasses and movable small compasses.
How to use the compass:
1. Measure the distance between the two feet of the compass with a ruler as the radius.
2. Fix the end in one place with a needle as the center of the circle.
3. Turn one end once with a pencil.