Question

By what minimum angle does a regular polygon with 18 sides rotate to coincide with its original position for the first time?

Answer 1

Answer:

hope it helps you dude ✌❤

Step-by-step explanation:

Rotations of 90 ∘ , 180 ∘ , and in either direction will all cause the square to be carried onto itself. A square has quarter-turn rotation symmetry, and so has an order of 4.

Answer 2

Answer:

simply 20 degrees.

Hope it helps