Circle Worksheet

1 a. The diameter of a circle is 5.6 mm. Calculate its radius.

 

 
1 b.

r = 7.7 mm

Calculate the area of the circle.

 

 
2 a.

C = 9.7 in

Calculate the radius of the circle.

 

 
2 b.

C = 6.6 in

Calculate the diameter of the circle.

 

 
3 a. The diameter of a circle is 4.9 cm. Calculate its area.

 

 
3 b. The circumference of a circle is 4.7 m. Calculate its diameter.

 

 
4 a.

C = 5.7 cm

Calculate the diameter of the circle.

 

 
4 b.

A = 9.4 ft2

Calculate the diameter of the circle.

 

 
5 a.

r = 2.5 m

Calculate the area of the circle.

 

 
5 b.

C = 8.5 in

Calculate the radius of the circle.

 

 
6 a.

A = 6.5 ft2

Calculate the diameter of the circle.

 

 
6 b. The circumference of a circle is 4.7 cm. Calculate its diameter.

 

 
7 a.

A = 3.7 in2

Calculate the circumference of the circle.

 

 
7 b.

C = 9.7 m

Calculate the area of the circle.

 

 
8 a.

||
r = 9.9 mm

Calculate the diameter of the circle.

 

 
8 b.

A = 2.8 mm2

Calculate the diameter of the circle.

 

 
9 a. The circumference of a circle is 4.8 cm. Calculate its area.

 

 
9 b. The radius of a circle is 5.2 m. Calculate its area.

 

 
10 a. The circumference of a circle is 2.6 m. Calculate its diameter.

 

 
10 b.

A = 7.2 yd2

Calculate the circumference of the circle.

 

 
Page 2

Answer Key

Answers are rounded to 2 decimals.

1 a.  2.8 mm
1 b.  186.17 mm2
2 a.  1.54 in
2 b.  2.1 in
3 a.  18.85 cm2
3 b.  1.5 m
4 a.  1.82 cm
4 b.  3.46 ft
5 a.  19.63 m2
5 b.  1.35 in
6 a.  2.88 ft
6 b.  1.5 cm
7 a.  6.82 in
7 b.  7.49 m2
8 a.  19.8 mm
8 b.  1.89 mm
9 a.  1.83 cm2
9 b.  84.91 m2
10 a.  0.83 m
10 b.  9.51 yd

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