Question

What is the difference between order of rotation and angle of rotation

Answer 1

Rotational symmetry is where you can turn an object so that it looks exactly the same. The number of positions in which it looks exactly the same gives you its order of symmetry.

The angle of rotation is a measurement of the amount, the angle, by which a figure is rotated counterclockwise about a fixed point, often the center of a circle.

Answer 2

90 degree is the answer