Question

why is meant by rotational symmetry exact definition

Answer 1

Symmetry states that a object looks exact the same as another object.

Symmetry has several types.

Its one type is rotational symmetry

What is rotational symmetry?

Let's find an answer

A rotational symmetry is a symmetry which looks exact the same after a rotation.

By it's name we can clear that it can be about some rotation.

So clearly we can say that any object rotated from center looks same than it has a rotational symmetry.

I hope it helps