Area of a Semicircle Worksheet
This worksheet focuses on calculating the area of semicircles, including problems involving radius, diameter, and real-world applications, suitable for Grade 11 math students.
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Area of a Semicircle
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Read each question carefully and calculate the area of the semicircle. Show all your work. Use π ≈ 3.14 where necessary.
1. Calculate the area of a semicircle with a radius of 7 cm.
2. A semicircle has a diameter of 18 meters. What is its area?
3. The formula for the area of a full circle is A = πr². Therefore, the formula for the area of a semicircle is A = .
4. If the diameter of a semicircle is 20 inches, its radius is inches.
5. Which of the following best approximates the area of a semicircle with a radius of 5 cm?
78.5 cm²
39.25 cm²
157 cm²
25 cm²
6. A circular pizza with a diameter of 14 inches is cut exactly in half. What is the area of one of the semicircular pieces?
7. Doubling the radius of a semicircle will double its area.
True
False
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