9514 1404 393
Answer:
8π m² ≈ 25.13 m²
Explanation:
The formula for the area of a circle is ...
A = πr²
The area of a semicircle is half that. Also, the radius (r) is half the diameter. So. the area of this semicircle is ...
A = (1/2)π(4 m)² = 8π m² ≈ 25.13 m²
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Comment on pi
If you use the 3-digit value 3.14 for pi to compute this 4-digit result, you will get 25.12.