Circle Worksheet

1 a. The circumference of a circle is 2.1 mm. Calculate its diameter.

 

 

1 b.

A = 5.8 m2

Calculate the circumference of the circle.

 

 

2 a.

A = 1.6 cm2

Calculate the radius of the circle.

 

 

2 b.

||
r = 5.5 m

Calculate the circumference of the circle.

 

 

3 a. The diameter of a circle is 1.3 yd. Calculate its circumference.

 

 

3 b. The diameter of a circle is 8.1 ft. Calculate its area.

 

 

4 a. The circumference of a circle is 5.4 m. Calculate its area.

 

 

4 b. The radius of a circle is 9 yd. Calculate its diameter.

 

 

5 a. The diameter of a circle is 9.8 in. Calculate its circumference.

 

 

5 b. The diameter of a circle is 6.6 cm. Calculate its area.

 

 

6 a. The circumference of a circle is 6.8 ft. Calculate its radius.

 

 

6 b. The area of a circle is 5.1 mm2. Calculate its radius.

 

 

7 a. The radius of a circle is 4.6 in. Calculate its circumference.

 

 

7 b.

A = 1.8 yd2

Calculate the radius of the circle.

 

 

8 a.

||
r = 3.5 in

Calculate the diameter of the circle.

 

 

8 b. The diameter of a circle is 4.9 in. Calculate its area.

 

 

9 a. The area of a circle is 1.5 yd2. Calculate its diameter.

 

 

9 b.

A = 2.8 in2

Calculate the diameter of the circle.

 

 

10 a.

A = 7.1 mm2

Calculate the diameter of the circle.

 

 

10 b.

A = 3.4 cm2

Calculate the radius of the circle.

 

 

Page 2

Answer Key

Answers are rounded to 2 decimals.

1 a.  0.67 mm
1 b.  8.54 m
2 a.  0.71 cm
2 b.  34.54 m
3 a.  4.08 yd
3 b.  51.5 ft2
4 a.  2.32 m2
4 b.  18 yd
5 a.  30.77 in
5 b.  34.19 cm2
6 a.  1.08 ft
6 b.  1.27 mm
7 a.  28.89 in
7 b.  0.76 yd
8 a.  7 in
8 b.  18.85 in2
9 a.  1.38 yd
9 b.  1.89 in
10 a.  3.01 mm
10 b.  1.04 cm


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