What is the area of a semi circle with the bottom of it being 36 inches

Given:
Semi-circle
bottom is 36 inches

The bottom is the diameter of the circle. Radius of the circle is 1/2 of diameter.

r = 36incehes / 2 = 18 inches

Area of a circle = π r²
A = 3.14 * (18in)²
A = 3.14 * 324in²
A = 1,017.36 in²

Area of a semi-circle = Area of a circle ÷ 2
A = 1,017.36 in² ÷ 2
A = 508.68 in²

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