A PE teacher quickly became popular on the Internet. It turns out that this PE teacher is on the playground, holding a tool similar to a big spoon in his right hand, and he can draw a perfect circle by walking around the playground casually.
A big spoon with enough white powder in it seems to have a certain weight. The PE teacher, calm and steady, walked step by step and drew a circle. Netizens exclaimed: God skills!
In the PE teacher's view, such a circle is a piece of cake for him. However, it can be recalled that when I was at school, I drew a circle on the draft paper to do the problem, and it was a little bigger. If I draw by hand, the circle may become an ellipse. If you don't use your hands, you may need the help of compasses.
Extended data:
Draw a perfect circle by hand, which people can never draw. At the very least, your arms must be strong, your steps should be even and steady, and you can't walk too fast or too slow. In addition, from a mathematical point of view, it is best to determine the center of the circle and keep the radius unchanged in order to draw a perfect circle. Therefore, some netizens ridiculed that the physical education teacher may have been a compass in his last life!
Practice makes perfect. I have to admire this PE teacher. It's really a stunt. In fact, no matter what you do, as long as you study hard and master the rules, you can find out a lot of tricks.