The center of the Pentagon in Arlington, Virginia, is a courtyard in the shape of a regular pentagon. The pentagon could be inscribed in a circle with a radius of 300 feet. Find the area of the courtyard. Round to the nearest tenth.
The pentagon will have 5 equal triangles.....each will have an area given by:
A = (1/2)(300^2)sin(72) = 42797.543233275 sq ft
And 5 times this = 213987.716166375 sq ft = 213987.7 sq ft [ rounded to the nearest tenth ]
