The radius of the circle Multiply that by two to get the diameter That is basically the height of the center of the rectangle multiply that by the base The radius is two which means that the diameter is 4 Multiply the height times the base to get the area of the whole rectangle 4*8 = 32 That is the area of the whole rectangle you need only the shaded side this means you have to find the area circle and subtract it from the area of the whole rectangle Area of the circle is A = pi r^2 plug in what you know A = pi (2)^2 A = pi 4 That is <span>12.56
Subtract it from the area of the rectangle 32 minus </span><span>12.56. The area of the shaded region is </span><span>19.4.
So, the area of a circle is a=pi r^2 so do that and get a=pi(4) and since the circle touches the edge of the rectangle, the rectangle is 4 cm tall, so 4*8 is 32 and pi(4) is about 12.56, so 32-12.56 is 19.44, and I believe that is the answer. (19.4)
