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Determine Radius and Diameter of a Circle

Total questions: 20

Worksheet time: 20mins

Name
Class
Date
1.

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

a)

20ft

b)

5ft

c)

31.4ft

d)

62.8ft

2.

What is the diameter of this circle?

a)

3.5

b)

3

c)

5

d)

7

3.

What is the radius?

a)

18

b)

72

c)

38

d)

14

4.

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

a)

Radius

b)

Diameter

5.

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

a)

Radius

b)

Diameter

6.

What is the radius of this circle?

a)

18in

b)

36in

c)

9in

d)

8in

7.

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. 

8.

What is the diameter?

a)

5 in

b)

10 in

c)

3.14 in

d)

15.84 in

9.

Determine the radius of the penny

a)

59.66 mm

b)

9.5 mm

c)

38 mm

d)

119.32 mm

10.

What is the radius?

a)

18

b)

72

c)

38

d)

14

11.

The circumference of the circle is 56.52 meters. What is the circle's radius?

a)

9 meters

b)

28.26 meters

c)

56.52 meters

d)

18 meters

12.

What is the diameter?

(do not find circumference)

a)

8

b)

16

c)

10

d)

4

13.

Which of the following is a radius of the circle?

a)

DA

b)

GE

c)

HI

d)

FG

14.

To go from diameter to radius, what do I need to do?

a)

divide by 3.14

b)

multiply by 3.14

c)

multiply by 2

d)

divide by 2

15.
a)
center
b)
diameter
c)
radius
16.

A circular swimming pool is has a circumference of 65.94 ft. What is the diameter of the pool?

a)

207.05 ft

b)

42 ft

c)

21 ft

d)

10.5 ft

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 diameter?

a)

8

b)

16

c)

10

d)

4

19.

To go from radius to diameter I need to do what?

a)

divide by 2

b)

multiply by 2

c)

multiply by 3.14

d)

divide by 3.14

20.

Q1. What is the distance from the center of a circle to its edge?

a)

A) center

b)

B) diameter

c)

C) radius