CPM Homework Banner

Home > GC > Chapter 12 > Lesson 12.2.1 > Problem 12-57

12-57.

The United States Department of Defense is located in a building called the Pentagon because it is in the shape of a regular pentagon. Known as “the largest office building in the world,” its exterior edges measure feet. Find the area of land enclosed by the outer walls of the Pentagon building. Homework Help ✎

Find the area using trigonometric ratios.

The interior angles of a regular pentagon measure