Wayground logo

Free Printable Worksheets

Font size

S
M
L
XL
Worksheets

Find Circumference of a Circle in Terms of Pi

Total questions: 19

Worksheet time: 19mins

Name
Class
Date
1.

Find the circumference, in "in terms of pi" of a circle with a DIAMETER of 8 inches.

a)

4π inches

b)

8π inches

c)

16π inches

d)

64π inches

2.

Find the circumference, in "in terms of pi" of a circle with a RADIUS of 22 inches.

a)

11π inches

b)

22π inches

c)

44π inches

d)

484π inches

3.

Find the circumference, in "in terms of pi" of a circle with a RADIUS of 8 inches.

a)

8π inches

b)

64π inches

c)

4π inches

d)

16π inches

4.

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

5.

Find Circumference. Leave answer in terms of pi (π).

a)

36π

b)

9π

c)

4.5π

d)

18π

6.

The equation C = πd, is used to find the circumference of a circle given it's diameter. This formula can be rearranged to solve for pi. Which equation is written correctly to solve for pi?

a)

π = Cd

b)

π = C ÷ d

c)

π = d ÷ c

d)

π = C - d

7.

What does Pi represent?

a)

The ratio of a square's perimeter to its area

b)

The ratio of a circle's diameter to its circumference

c)

The ratio of a rectangle's length to its width

d)

The ratio of a circle's circumference to its diameter

8.

What is Pi?

a)

Ratio of Circumference to diameter

b)

The distance around the outside of a circle

c)

The distance from one side of a circe to the other through the center

d)

The distance from the center of a circle to the outside

9.

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

10.

Find the circumference of the circle in the image.

a)

10π

b)

20π

c)

100π

d)

20

11.

Fill in the blank. The circumference of a circle is the ________.

a)

distance around it

b)

space inside it

12.

What is the circumference of a circle with a radius of 5 in terms of π ?

a)

5 π square units

b)

10 π square units

c)

25 π square units

d)

50 π square units

13.

A DVD has a diameter of 15 millimeters. What is the circumference?

a)

c = 15π

b)

C = 2π15

c)

c = 15/π

d)

c = 15/2π

14.

Which expression could be used to find the approximate circumference of this quilt piece?

a)

2π16

b)

2π8

c)

2(8)

d)

2(4)

15.

What is the distance around a circle?

a)

Circumference

b)

Area

c)

Diameter

d)

Radius

16.

Alex has trained his puppy, Popper, to jump through a ring. According to Alex's measurements and calculations, the ring has a diameter of 3.5 feet. What is the ring's circumference (use 3.14 for pi)?

a)

11.32 ft

b)

12.25 ft

c)

10.99 ft

d)

8.75 ft

17.

How many cookies are there?

a)

48 cookies

b)

24 cookies

c)

8 cookies

d)

4 cookies

18.

What is the circumference of a circle with a diameter of 1 inch? Use 3.14 for pi.

a)

3.14 inches

b)

6.28 inches

c)

314 inches

d)

628 inches

19.

Choose the answer which best describes how these formulas are related to each other.

a)

They both solve for circumference. In the first formula it uses diameter, in the second formula it uses two times the radius, which is the same thing as diameter.

b)

They both solve for circumference, in the first uses diameter and the second uses pi.

c)

They both solve for area. In the first formula it uses diameter, in the second formula it uses two times the radius, which is the same thing as diameter.

d)

They both use circumference to solve for pi. One uses radius, the other uses diameter.