A polygon has an angle that measures 77 degrees. When the polygon is rotated 90 degrees, what will be the measurement of the angle?
1 answer
When a polygon is rotated 90 degrees, the angle formed at each vertex is the complement of the original angle. Therefore, the measure of the angle after rotating 90 degrees will be 90 - 77 = <<90-77=13>>13 degrees. Answer: \boxed{13}.