Question

Comment on the order of rotational symmetry of an equilateral triangle?

Answer 1

Given the images of the equilateral triangle in the order A, B and C. A is the original image.

The images B and C are generated by rotating the original image A.

When we look at the above images, it fits on to itself 3 times during a full rotation of 360 degrees.

So, an equilateral triangle has rotational symmetry of order 3.