Circle Worksheet

1 a.

C = 7.1 m

Calculate the diameter of the circle.

 

 
1 b.

||
d = 7.4 mm

Calculate the radius of the circle.

 

 
2 a.

d = 1.5 m

Calculate the circumference of the circle.

 

 
2 b.

r = 8.9 mm

Calculate the circumference of the circle.

 

 
3 a.

d = 7.3 m

Calculate the radius of the circle.

 

 
3 b.

||
d = 4.5 cm

Calculate the circumference of the circle.

 

 
4 a.

C = 6.9 cm

Calculate the radius of the circle.

 

 
4 b.

C = 8 ft

Calculate the diameter of the circle.

 

 
5 a.

C = 4.8 cm

Calculate the radius of the circle.

 

 
5 b. The radius of a circle is 3.4 yd. Calculate its circumference.

 

 
6 a.

r = 8.5 mm

Calculate the diameter of the circle.

 

 
6 b. The radius of a circle is 5.4 cm. Calculate its area.

 

 
7 a. The circumference of a circle is 7.9 cm. Calculate its radius.

 

 
7 b. The circumference of a circle is 5.9 cm. Calculate its area.

 

 
8 a.

C = 3.3 cm

Calculate the radius of the circle.

 

 
8 b.

A = 6 yd2

Calculate the diameter of the circle.

 

 
9 a.

d = 6.3 cm

Calculate the radius of the circle.

 

 
9 b. The area of a circle is 9.5 m2. Calculate its diameter.

 

 
10 a. The area of a circle is 1 cm2. Calculate its circumference.

 

 
10 b.

C = 3.4 in

Calculate the radius of the circle.

 

 
Page 2

Answer Key

Answers are rounded to 2 decimals.

1 a.  2.26 m
1 b.  3.7 mm
2 a.  4.71 m
2 b.  55.89 mm
3 a.  3.65 m
3 b.  14.13 cm
4 a.  1.1 cm
4 b.  2.55 ft
5 a.  0.76 cm
5 b.  21.35 yd
6 a.  17 mm
6 b.  91.56 cm2
7 a.  1.26 cm
7 b.  2.77 cm2
8 a.  0.53 cm
8 b.  2.76 yd
9 a.  3.15 cm
9 b.  3.48 m
10 a.  3.54 cm
10 b.  0.54 in

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