Question

1. a(n) ? polygon is both equiangular and equilateral.
2. if angles are complementary, then their measures add to ?
3. if two lines intersect to form a right angle, then they are ?

Explanation:

1. By definition, a regular polygon has all sides equal (equilateral) and all angles equal (equiangular).
2. Complementary angles are defined as two angles whose measures sum to 90 degrees.
3. When two lines intersect to form a right - angle, they are perpendicular by definition.

Answer:

1. regular
2. 90 degrees
3. perpendicular