Area of a Semicircle Worksheet
Calculate the area of semicircles using the given radius or diameter for Grade 7 students.
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Area of a Semicircle
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Read each question carefully and calculate the area of the semicircle. Use π ≈ 3.14 and round your answers to two decimal places where necessary.
1. Calculate the area of a semicircle with a radius of 7 cm.
2. Find the area of a semicircle with a diameter of 10 inches.
3. The area of a full circle is given by the formula A = πr². So, the area of a semicircle is half of that, which is .
4. If the diameter of a semicircle is 14 meters, its radius is meters.
5. Which of the following is the correct formula for the area of a semicircle?
A = πr²
A = 2πr
A = ½πr²
A = πd
6. A semicircle has a radius of 5 cm. Its area is approximately:
78.5 cm²
39.25 cm²
15.7 cm²
31.4 cm²
7. The area of a semicircle is always half the area of a full circle with the same radius.
True
False
8. If you double the radius of a semicircle, its area will also double.
True
False
9. A circular pizza with a diameter of 16 inches is cut exactly in half. What is the area of one of the semicircular slices?
10. A gardener wants to create a semicircular flower bed with a radius of 3 feet. How much area will the flower bed cover?