Area of a circle = (pi)(radius squared)
Find the area of the larger circle, then find the area of the smaller circle and then subtract the difference.
Larger Circle:
A=(3.142)(5cm)2
A=(3.142)(25)
A=78.55
Smaller Circle:
A=(3.142)(2)2
A=(3.142)(4)
A=12.57
Subtract difference between the 2:
78.55-12.57= 65.98 cm is the area of the shaded portion
