Answer:
18π ≈ 56.52
Step-by-step explanation:
The area of a circle is given by the formula ...
A = πr²
For a circle of radius 6, the area is ...
A = π(6²) = 36π
You have half a circle, so the area is half that.
semicircle area = 18π . . . units²
Using 3.14 for π, the numerical value is
18·3.14 = 56.52 . . . units²
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Comment on the numerical value
If you use a more accurate value for π, the area computes to about ...
18π ≈ 56.5487 units^2
Of course, you're asked to use a particular value for π, so this answer is of no use.
