Answer:
Step-by-step explanation:
The area of a pentagon given the radius is
Area = (5/2)r^2 * sin(72º)
r = 7
Area = (5/2)*7^2 * sin(72)
Area = 122.5 * 0.95106
Area = 116.5
=============
r = 5
Area = (5/2) * 5^2 * sin(72)
Area = 59.4
Area of the shaded area = 116.5 - 59.4
Area of the shaded area = 57.1
