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Parts of a Circle, Circumference and Area of a Circle

Total questions: 15

Worksheet time: 15mins

Name
Class
Date
1.

What is the radius of this circle?

a)

18

b)

36

c)

9

d)

8

2.

What number is pi?

a)

41

b)

00

c)

3.14

d)

5.14

3.

What is the distance around a circle?

a)

Circumference

b)

Area

c)

Diameter

d)

Radius

4.

what is the circumference of this circle ?

a)

3.14 cm 

b)

37.68 cm

c)

24 cm

d)

68.4 cm

5.

A Circle has a radius of 4.  What is the area of the circle? (Best Choice) (note: units are squared)

a)

4π or about 12.56

b)

16π or about 50.24

c)

2π or about 6.28

d)

8π or about 25.12

6.

A Circle has a diameter of 10 centimeters.  What is the area of the circle? (Best Choice)

a)

5π or about 15.7 cm2

b)

10π or about 31.4 cm2

c)

25π or about 78.5 cm2

d)

100π or about 314 cm2 

7.

The circumference of a circle is

a)

The measurement from an edge of a circle to another edge.

b)

The measurement around the circle

c)

The measurement from an edge of a circle to another edge going through the center

d)

The measurement from the center of the circle to an edge of the circle

8.

Other than the formula C=πd what is another formula for circumference of a circle?

a)

C=2π

b)

C=2πr

c)

C=πr²

d)

C=πd²

9.

Meg swam from one side of her circular pool to the other side going through the center.  If Meg swam 8 feet, what is the approximate circumference of Meg's pool?

a)

16 feet

b)

25.12 feet

c)

251.2 feet

d)

4 feet

10.

Is the red line a radius or diameter of the circle?

a)

Radius

b)

Diameter

11.

What is π ? (Best Choice)

a)

The ratio of the circumference of any circle to its diameter.

b)

Exactly 3.14

c)

Exactly 3.1415

d)

Exactly 3.141593

12.

If my radius is 10ft, what is my diameter?

a)

20ft

b)

5ft

c)

31.4ft

d)

62.8ft

13.

What is the diameter of this circle?

a)

3.5

b)

3

c)

5

d)

7

14.

What is the diameter?

a)

8

b)

16

c)

10

d)

4

15.

A bicycle tire has a diameter of 27 inches. What is the radius?

a)

27π

b)

13.5

c)

81

d)

25π