Question

The semicircle below has diameter $20$. Find the area of the blue region.

Answer 1

We subtract the area of the triangle from the area of the semicircle

Answer 2

Area of the blue region is 61 units²

Area of semi circle

• area = π / 2 r²

Therefore,

r = radius

Area of the blue region  = area of semi circle - area of triangle

Therefore,

area of triangle = 1/bh

where

b = base

h = height

Therefore,

area of triangle = 1 / 2 × 12 × 16 = 96 units²

area of semi circle = 3.14 × 10² /  2 = 157 units²

Area of the blue region  = 157 - 96 = 61 unit²

learn more on semi circle here: https://brainly.com/question/24887556