The answer is B, it is equiangular. This is because an equiangular polygon has equal internal angles, in this case they are 90 degrees. An equilateral polygon on the other hand, is a polygon in which all of the sides are equal. This polygon is not equilateral. A regular polygon is one that is both equiangular and equilateral. This polygon is not considered regular because it is not equilateral. So the answer would be B, equiangular. Hope this helps!
