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Worksheets

Circumference of Circles

Total questions: 21

Worksheet time: 2hrs 45mins

Name
Class
Date
1.

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

2.

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

3.

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

4.

The definition of a circle is

a)

set of all points in a plain that are the same distance from a point called the center

b)

the distance around a share

c)

a large figure

d)

a pizza, orange, plum, or watermelon

5.

What number represents π?

a)

31.4

b)

4.13

c)

3.14

d)

34.1

6.
If my radius is 2 yd what is the circumference?
a)
4 yd
b)
1 yd
c)
12.56 yd
d)
6.28 yd
7.
If my diameter is 90cm, what is my circumference?
a)
282.6cm
b)
180 cm
c)
90cm
d)
565.2cm
8.

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

9.

Find the circumference of the circle.

a)

31.4 cm

b)

78.5 cm

c)

314 cm

d)

15.7 cm

10.

Find the circumference of the circle.

a)

38.47 cm

b)

10.99 cm

c)

43.96 cm

d)

21.98 cm

11.

Find the circumference of the circle.

a)

78.5 cm

b)

15.7 cm

c)

7.85 cm

d)

19.6 cm

12.
The radius of the circle is 9 meters.  What is the circle's circumference?
a)
9 meters
b)
28.26 meters
c)
56.52 meters
d)
18 meters
13.
A cruise ship has a large, circular window. It has a diameter of 6 meters. What is the window's approximate circumference?
a)
3 m 
b)
9.42 m
c)
12 m
d)
18.84 m
14.

The circumference of a circle is 25.12 cm. What is the diameter to the nearest centimeter?

a)

4 cm

b)

8 cm

c)

25 cm

d)

75 cm

15.

The distance around a circular dance hall room is 135 feet. Which of the following is closest to the longest distance across the dance hall?

a)

19 feet

b)

28 feet

c)

36 feet

d)

43 feet

16.

Find the radius if the circumference is 14.444

(a)  

17.

Find the diameter if the circumference is 166.42

(a)  

18.

Find the radius if the circumference is 102.05

(a)  

19.

Find the diameter if the circumference is 157

(a)  

20.

The diameter of a Merry-Go-Round is 44 yards. How far would I travel if I went 6 rotations before getting off?

(a)  

21.

How do you feel about finding the circumference, radius, and diameter of a circle when given one of the three?

a)

Great! I am ready to move on.

b)

Good, but I would like some more practice.

c)

Okay, but I still need help from a teacher or classmate.

d)

Bad. I am not sure how to do this at all yet.