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Worksheets

Circumference of Circles

Total questions: 31

Worksheet time: 3hrs 35mins

Name
Class
Date
1.

The diameter of a circle painted by Micheal is 12ft. What is the length of the radius?

a)

9ft

b)

6ft

c)

22ft

d)

24ft

2.

Landon drew a circle with a radius of 4 meters. What is the diameter of the circle?

a)

4 meters

b)

8 meters

c)

16 meters

d)

2 meters

3.

Find the circumference of the circle.

a)

14.13 cm

b)

63.56 cm

c)

28.26 cm

d)

127.17 cm

4.

What number represents π?

a)

31.4

b)

4.13

c)

3.14

d)

34.1

5.

The definition of radius is

a)

distance from one point to another point

b)

distance around the circle

c)

distance from the center to any point on the circle

d)

distance across the circle through the center

6.

The definition of diameter is

a)

distance from the center of any point on the circle

b)

distance across the circle through the center

c)

distance from one point to another

d)

distance around the circle

7.

The definition of circumference is

a)

distance from the center of any point on the circle

b)

distance from one point to another

c)

distance around the circle

d)

distance from the center of any point on the circle

8.
If my diameter is 90cm, what is my circumference?
a)
282.6cm
b)
180 cm
c)
90cm
d)
565.2cm
9.

Find the circumference with a radius of 5.8 cm.

a)

37 cm

b)

38.3 cm

c)

36.4 cm

d)

42.7 cm

10.

What is circumference of a circle with a radius of 25

a)

157

b)

78.5

c)

158

d)

299

11.

what is the formula for finding circumference


select ALL that apply

a)

c = π d

b)

c = 2 π r

c)

d = 2 r

d)

r = d/2

12.

The red arrows in this picture shows the...

a)

Circumference

b)

Radius

c)

Diameter

13.
If my radius is 10ft, what is my diameter?
a)
20ft
b)
5ft
c)
31.4ft
d)
62.8ft
14.
If my diameter is 19 inches, what is my radius?
a)
38 inches
b)
9.5 inches
c)
59.66 inches
d)
119.32 inches
15.

Find the circumference with a radius of 5.8 cm. Use 3.14 for pi.

a)

37 cm

b)

38.3 cm

c)

36.4 cm

d)

42.7 cm

16.
Is the red line a radius or diameter of the circle?
a)
Radius
b)
Diameter
17.
The radius of a circle is
a)
The measurement from the center of a circle to an edge of the circle.
b)
The measurement around the circle
c)
The measurement from and edge of the circle to another edge through the center
d)
A line perpendicular to the diameter of the circle
18.
What is the radius?
a)
18
b)
72
c)
38
d)
14
19.
What is the circumference of this circle ?
a)
3.14 cm 
b)
37.68 cm
c)
24 cm
d)
68.4 cm
20.
What is the formula for circumference of a circle given the diameter?
a)
C = pi x r
b)
C = pi x 2r
c)
C = pi x D
d)
C = pi x 2D
21.
A circular swimming pool is 21 feet in diameter.
How many feet around is the pool?
a)
10.5 ft
b)
42 ft
c)
65.94 ft
d)
131.95 ft
22.
If my radius is 10ft, what is my diameter?
a)
20ft
b)
5ft
c)
31.4ft
d)
62.8ft
23.
Find the circumference (to the nearest whole number)
a)
88 in
b)
44 in
c)
116 square in
d)
None of the above
24.
What is the distance around a circle?
a)
Circumference
b)
Area
c)
Diameter
d)
Radius
25.
The diameter of a circle is:
a)
The measurement around the circle.
b)
The distance from an edge of a circle to another edge.
c)
The distance from the center of the circle to an edge of a circle
d)
The distance from an edge of a circle to another edge through the center. 
26.
The diameter of a circle is 3 centimeters. What is the circumference?
a)
11.5cm2
b)
9.42 cm2
c)
unicorns are awsome
d)
45.3 cm2
27.
What is the diameter?
a)
8
b)
16
c)
10
d)
4
28.

If the diameter of a circle is 4, what is the radius?

a)

4

b)

c)

d)

2

29.
If my diameter is 19 inches, what is my radius?
a)
38 inches
b)
9.5 inches
c)
59.66 inches
d)
119.32 inches
30.

What is the diameter?

a)

8cm

b)

16cm

c)

10cm

d)

4cm

31.

Steven purchases a bowl. The diameter of the bowl is 14 cm.

What is the distance around the bowl?

a)

21.98 cm

b)

43.96 cm

c)

87.96 cm

d)

7 cm