The semicircle below has diameter 20. Find the area of the blue region.
Area of a circle = pi r^2
area of the semi circle = 1/2 pi r^2
area of the triangle to subtract from the semi circle area = 1/2 b h = 1/2 12 16
1/2 pi 10^2 - 1/2 *12 *16 = blue area
Well....YOU do the math and tell me.....I try not to give answers only.....you can do it very easily.....