Question

Find the area of a semicircle with a diameter of 20inches. Use 22/7 as an approximation for pi

Answer 1

157 1/7 inches

Explanation:

I used the formula, A = pi x r squared then divided by 2, since a semicircle is half of a normal circle.

(22/7 x 10 squared divide by 2)

Answer 2

2200/7 ≈ 314.2857143

Explanation:

The formula for the area of a circle is πr²

Since the diameter is 20, the radius is going to be 10 inches

Now just plug that in and get π(10²) which equals 100π

Now multiply 100 with (22/7) and that gives you 2200/7