How many right angles are in a regular pentagon?

A regular pentagon, which has five equal sides and five equal angles, does not contain any right angles. Each interior angle of a regular pentagon measures 108 degrees.

Understanding Angles in a Pentagon

To grasp why there are no right angles, consider the following:

• A right angle measures 90 degrees.
• The formula for finding the interior angle of a regular polygon is: (n - 2) × 180° / n, where n is the number of sides.
• For a pentagon, this calculation is: (5 - 2) × 180° / 5 = 108°.

Summary

In summary, a regular pentagon has five angles, each measuring 108 degrees, and thus contains no right angles at all.