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Worksheets

Area & Circumference of Circles

Total questions: 20

Worksheet time: 51mins

Name
Class
Date
1.
What is the diameter?
a)
5 in
b)
10 in
c)
3.14 in
d)
15.84 in
2.

A DVD has a diameter of 15 millimeters. Which equation would help you determine the area?

a)

A = 152π

b)

A = 2π15

c)

A = 7.52π

d)

A = 15 π

3.

A circle has a radius of 5 cm. What is the area?

a)

78.5 cm2

b)

31.4 cm2

c)

15.7 cm2

d)

314 cm2

4.

The diameter of a quarter is 24.26 mm. What is closest to the circumference of the outer edge of the quarter? Use 3.14 for Pi.

a)

76.18 mm

b)

38.01 mm

c)

463 mm

d)

1,848 mm

5.

The diameter of the wheel on a bicycle is 24 inches. Which is closest to the circumference of the wheel?

a)

25.36 in

b)

37.68 in

c)

75.36 in

d)

452.16 in

6.

The radius of this pizza is 9 ½ in. What is the approximate area of the pizza?

a)

81 in2

b)

29.83 in2

c)

59 ⅔ in2

d)

283 ½ in2

7.

The circumference of a circle is 37.68 yds. What is the diameter? Use 3.14 for Pi.

a)

118.3 yds

b)

6 yds

c)

12 yds

d)

59.5 yds

8.

The circumference of a circle is 28.26 cm. What is closest to the area of the circle.

a)

254.34 cm2

b)

14.13 cm2

c)

63.6 cm2

9.

What is the diameter of circle with a radius of 6?

a)

12

b)

36

c)

2 times 3

d)

42

10.

What is the formula to find the area of a circle?

a)

A = πd

b)

A = 2πr

c)

A = πr2

d)

A = xyz

11.
The radius is 8 inches.  What is the circumference?
a)
50.24 inches
b)
25.12 inches
c)
12.56 inches
d)
200.96 inches
12.
What is the area of a circle?
a)
The distance around a circle.
b)
The space inside the circle.
c)
A line from side to side passing through the center.
d)
A line from the center to the side.
13.
What is circumference?
a)
The distance around a circle.
b)
The space inside the circle.
c)
A line from side to side passing through the center.
d)
A line from the center to the side.
14.
Find the area of the circle
a)
43.96
b)
153.86
c)
87.82
d)
307.72
15.
Find the circumference of the circle
a)
87.82
b)
153.86
c)
43.96
d)
307.72
16.

Find the area of the circle in the picture.

a)

34.54 in²

b)

69.08 in²

c)

379.94 in²

d)

254.34 in²

17.

A horse is tethered to a peg at the center of the field. If the length of the rope is 18.3 m (radius), what will be the maximum area the horse can graze?

a)

1051.6 m2

b)

57.5 m2

c)

75.76 m2

d)

4206 m2

18.

A cathedral window is built in the shape of a semicircle. If the window is to contain three stained glass sections of equal size, what is the area of each stained glass section? Express answer to the nearest square foot. (Hint: the 3 sections together are 1/2 a circle, so each section is how much of the circle?)

a)

1 sq. ft

b)

13 sq. ft

c)

3 sq. ft

d)

26 sq. ft

19.

What is the approximate area of the given circle?

a)

94.8 cm2

b)

47.4 cm2

c)

716 cm2

d)

2863.8 cm2

20.

This crop circle has a diameter of 118 ft. What is the approximate area of the crop circle?

a)

370.5 ft2

b)

43,721.4 ft2

c)

10,930.34 ft2

d)

185.26 ft2