California Assessment of Student Performance and Progress (CAASPP) Math Practice Exam 2026 - Free CAASPP Math Practice Questions and Study Guide

To determine the sum of the interior angles of a pentagon, you can use the formula for calculating the sum of interior angles of any polygon, which is given by:

Sum of interior angles = (n - 2) × 180°

In this formula, 'n' represents the number of sides of the polygon. For a pentagon, which has five sides, you would substitute 5 for 'n':

Sum of interior angles = (5 - 2) × 180°

= 3 × 180°

= 540°

Thus, the sum of the interior angles of a pentagon is 540°. This value reflects the total angle measure when you add all the angles inside a five-sided figure together. Understanding this concept is essential for solving problems related to polygons in geometry.