Question

What rotation symmetry does a square have?

Answer 1

For any regular n-gon, it has a rotational symmetry of 360/n

For example, if n = 5, we have a pentagon. If we have a regular pentagon, then it has a rotational symmetry of 360/n = 360/5 = 72 degrees. This means that the figure matches up with itself perfectly every 72 degrees of rotation. You are rotating this figure about the center.

Answer 2

huh? @jim_thompson5910

Answer 3

in your case, n = 4 because a square is really a regular 4-gon

in other words, it's a polygon with 4 congruent sides and 4 congruent angles