Area and Circumference of a Circle Worksheet
A Grade 12 math worksheet on calculating the area and circumference of circles, including problems with given radius, diameter, and contextual applications.
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Area and Circumference of a Circle
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Read each question carefully and solve for the area or circumference of the circle as indicated. Show all your work. Use π ≈ 3.14 where necessary, and round your answers to two decimal places.
1. A circular garden has a radius of 7 meters. Calculate its circumference and area.
2. The diameter of a bicycle wheel is 60 cm. Find the circumference and the area of the wheel.
3. If the circumference of a circle is 31.4 units, what is its approximate radius?
5 units
10 units
15 units
20 units
4. What is the area of a circle with a diameter of 14 cm?
21.98 cm²
43.96 cm²
153.86 cm²
615.44 cm²
5. The formula for the circumference of a circle is C = or C = .
6. The formula for the area of a circle is A = .
7. Doubling the radius of a circle doubles its area.
True
False
8. The ratio of a circle's circumference to its diameter is always π.
True
False
9. A circular swimming pool has a circumference of 50.24 meters. What is the area of the pool's surface?
10. If the area of a circular pizza is 113.04 square inches, what is the diameter of the pizza?