What is called a polygon with equal angle measure?

All you can say about it is that it's "equiangular" ... a big Word that means all of

its angles measure the same size.

At first, one might think that a polygon with all angles equal is "regular" ... that if

all of its angles are equal, then its sides must also be all of the same length. But

that's only true of a triangle, and doesn't hold for polygons with more than three

sides. Example: A rectangle has all angles equal, but not its sides.