Question

What is the smallest angle of rotational symmetry for a square

Answer 1

is it 90 degrees because all square have a 90 degree angle?

Answer 2

When we rotate a figure and there is no change in the shape of the figure then it has rotational symmetry.

We know that the order of rotation for a square is 4.

Hence, we have
`(360)/(4) =90^(\circ)`

Thus, the angle of rotational symmetry of square are

`90^(\circ), 180^(\circ), 270^(\circ)`

Hence, the minimum angle of rotational symmetry is
`90^(\circ)`

Therefore, the minimum angle of rotational symmetry for a square is 90 degrees.