Question

A parallelogram has an interior angle measuring 81°. Which MUST also be the measure of an interior angle of the parallelogram?

A) 9°
B) 19°
C) 49°
D) 89°
E) 99°

Answer 1

OPTION E 99 degress

Explanation:

We know that all opposite sides are congruent. None of these single ones can add up to 360 degrees. So we have to get half of it. The answer is clear now.