Area of a Semicircle Worksheet
Calculate the area of semicircles given various dimensions, including problems involving perimeter and composite shapes.
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Area of a Semicircle
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Read each question carefully and show all your work. Use π ≈ 3.14 where necessary. Round your answers to two decimal places.
1. Calculate the area of a semicircle with a radius of 7 cm.
2. A semicircle has a diameter of 18 inches. Find its area.
3. The perimeter of a semicircle is 25.7 cm. What is its area?
4. If the area of a semicircle is 39.27 cm², what is its radius?
5 cm
7 cm
10 cm
12 cm
5. Which formula correctly represents the area of a semicircle?
πr²
2πr
½πr²
πd
6. The area of a full circle is given by the formula , so the area of a semicircle is half of that.
7. If the diameter of a semicircle is 10 meters, its radius is meters.
8. The area of a semicircle is always greater than its perimeter.
True
False
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