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Free Area of a Circle Worksheet

Ten area-of-a-circle problems that leave the answer in terms of pi, with a matching key.

Answer key included
Name: Date:
Area of a Circle
1.
Find the area of a circle with radius 2525. Use π≈3.14\pi \approx 3.14.
2525
2.
Find the area of a circle with radius 77. Use π≈3.14\pi \approx 3.14.
77
3.
Find the area of a circle with radius 1313. Use π≈3.14\pi \approx 3.14.
1313
4.
Find the area of a circle with radius 1010. Use π≈3.14\pi \approx 3.14.
1010
5.
Find the area of a circle with radius 99. Use π≈3.14\pi \approx 3.14.
99
6.
Find the area of a circle with radius 88. Use π≈3.14\pi \approx 3.14.
88
7.
Find the area of a circle with radius 44. Use π≈3.14\pi \approx 3.14.
44
8.
Find the area of a circle with radius 66. Use π≈3.14\pi \approx 3.14.
66
9.
Find the area of a circle with radius 1818. Use π≈3.14\pi \approx 3.14.
1818
10.
Find the area of a circle with radius 1616. Use π≈3.14\pi \approx 3.14.
1616
Andy · alldayeverydaymath.com
Name: Answer KeyDate:
Area of a Circle
1.
Find the area of a circle with radius 2525. Use π≈3.14\pi \approx 3.14.
2525
Answer: A=1962.5A = 1962.5
2.
Find the area of a circle with radius 77. Use π≈3.14\pi \approx 3.14.
77
Answer: A=153.86A = 153.86
3.
Find the area of a circle with radius 1313. Use π≈3.14\pi \approx 3.14.
1313
Answer: A=530.66A = 530.66
4.
Find the area of a circle with radius 1010. Use π≈3.14\pi \approx 3.14.
1010
Answer: A=314A = 314
5.
Find the area of a circle with radius 99. Use π≈3.14\pi \approx 3.14.
99
Answer: A=254.34A = 254.34
6.
Find the area of a circle with radius 88. Use π≈3.14\pi \approx 3.14.
88
Answer: A=200.96A = 200.96
7.
Find the area of a circle with radius 44. Use π≈3.14\pi \approx 3.14.
44
Answer: A=50.24A = 50.24
8.
Find the area of a circle with radius 66. Use π≈3.14\pi \approx 3.14.
66
Answer: A=113.04A = 113.04
9.
Find the area of a circle with radius 1818. Use π≈3.14\pi \approx 3.14.
1818
Answer: A=1017.36A = 1017.36
10.
Find the area of a circle with radius 1616. Use π≈3.14\pi \approx 3.14.
1616
Answer: A=803.84A = 803.84
Andy · alldayeverydaymath.com

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About this worksheet

Given a radius, students apply A = pi r-squared and report the exact answer in terms of pi. A great drill for locking in the formula before mixing circles into composite-figure work.

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