Followed by hand

Draw a circle with the help of special tools - is simple enough. But how to create a perfect circle with a minimum of errors by hand? Classic option: use a thread, rope, string. One end of the press in the center of the future shape, pull the cord and the devil. We would like to offer one more interesting way - no strings, and tools. The video below shows everything clearly: the ring finger is used as a support (as the leg of a compass). We fix the arm with a pencil and a sheet of paper is rotated. With a little practice - and you will get a great, perfect circle.

Source: mirfactov.com/