Circle Worksheet

1 a. The radius of a circle is 2.4 cm. Calculate its diameter.

 

 
1 b.

||
r = 6.2 m

Calculate the circumference of the circle.

 

 
2 a. The area of a circle is 3.6 mm2. Calculate its radius.

 

 
2 b.

||
d = 6.7 ft

Calculate the area of the circle.

 

 
3 a.

C = 6.1 mm

Calculate the diameter of the circle.

 

 
3 b.

r = 3.8 in

Calculate the area of the circle.

 

 
4 a. The radius of a circle is 9.3 ft. Calculate its diameter.

 

 
4 b. The radius of a circle is 2.5 cm. Calculate its area.

 

 
5 a.

r = 2.9 m

Calculate the circumference of the circle.

 

 
5 b. The circumference of a circle is 2.8 in. Calculate its diameter.

 

 
6 a. The area of a circle is 1.8 ft2. Calculate its diameter.

 

 
6 b.

C = 9.7 m

Calculate the diameter of the circle.

 

 
7 a.

||
r = 9.9 in

Calculate the area of the circle.

 

 
7 b.

C = 3.9 ft

Calculate the diameter of the circle.

 

 
8 a. The area of a circle is 7.4 ft2. Calculate its diameter.

 

 
8 b. The circumference of a circle is 6.5 ft. Calculate its area.

 

 
9 a. The circumference of a circle is 4.3 cm. Calculate its area.

 

 
9 b.

C = 8.9 ft

Calculate the area of the circle.

 

 
10 a.

d = 4.5 ft

Calculate the radius of the circle.

 

 
10 b.

||
d = 5.4 ft

Calculate the circumference of the circle.

 

 
Page 2

Answer Key

Answers are rounded to 2 decimals.

1 a.  4.8 cm
1 b.  38.94 m
2 a.  1.07 mm
2 b.  35.24 ft2
3 a.  1.94 mm
3 b.  45.34 in2
4 a.  18.6 ft
4 b.  19.63 cm2
5 a.  18.21 m
5 b.  0.89 in
6 a.  1.51 ft
6 b.  3.09 m
7 a.  307.75 in2
7 b.  1.24 ft
8 a.  3.07 ft
8 b.  3.36 ft2
9 a.  1.47 cm2
9 b.  6.31 ft2
10 a.  2.25 ft
10 b.  16.96 ft

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