The area of a circle = PI * radius^2 area = 3.14159 * 16 area =
<span>
<span>
<span>
50.265 </span></span></span><span>area =
<span>
PI * 16</span></span>
<span>We have to determine the area of the shaded section, which is (3 / 4) of the circle. The unshaded section is occupied by a 90 degree angle which is (1 / 4) of a circle (All circles contain 360 degrees). So the shaded section = </span>50.265 * (3 / 4) = <span>37.699</span> OR 16 * PI * (3 / 4) = 12 * PI