Another word for regular, as in a regular polygon. An equiangulateral polygon is a polygon with exactly four congruent angles and sides. If you don't know what a polygon, angle, or side is, then you may need to take geometry again.
A geometry class full of asians.
Geometry teacher: Ok class. This polygon has four sides that are all exactly 8 inches long, and it has four angles that are exactly right angles. What is it?
Asian #1: It is a regular polygon.
Geometry teacher: No, it's an equiangulateral polygon you stupid asian!!!
Asian #2: Ouch...