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Area and Circumference of a Circle

Total questions: 24

Worksheet time: 4hrs 0mins

Name
Class
Date
1.
Marisa purchases a pot for her father's garden. The diameter of the bottom of the pot is 18 cm. What is the area of the pot's bottom? (Round to the nearest whole number.)
a)
28 cm²
b)
57 cm²
c)
254 cm²
d)
1017 cm²
2.
What is the area of a circle with a diameter of 10 cm ?
a)
31.4 cm²
b)
78.5 cm²
c)
15.7 cm²
d)
314 cm²
3.
What is the formula for area of a circle given the radius?
a)
A = πr
b)
A = 2πr
c)
A = πd
d)
A = πr²
4.

Jonas drew a circle with half the radius of Hannah's. Hannah drew a circle with a radius of 30 cm. What is the area of Jona's circle?

a)

2,700 cm2

b)

675 cm2

c)

90 cm2

d)

15 cm2

5.

Circle N has half the radius of Circle M. Circle M has a radius of 10 cm. What is the area of Circle N?

a)

31.4 cm2

b)

314 cm2

c)

78.5 cm2

d)

5 cm2

6.

Circle R has half the radius of Circle Q. Circle Q has a radius of 12 cm. What is the area of Circle R?

a)

37.68 cm2

b)

452.16 cm2

c)

6 cm2

d)

113.04 cm2

7.
What is the area of this circle?
a)
163.2
b)
15.3
c)
124.2
d)
113.1
8.
What is the area of this circle?
a)
1256.64
b)
31.41
c)
314.16
d)
123.12
9.

The radius of a circular clock is 13 centimeters. What is the area?

a)

530.66 cm2

b)

81.68 cm2

c)

40.84 cm2

d)

348.99 cm2

10.

A hula hoop has a diameter of 3 feet. What is it's area?

a)

18.85 ft2

b)

9.42 ft2

c)

28.26 ft2

d)

7.07 ft2

11.

Bob has a pool with a radius of 15 feet. what is it's area?

a)

706.86

b)

176.71

c)

225

d)

167.17

12.

Max has a pizza with a diameter of 100 inches. What is it's area?

a)

31415.93

b)

7853.98

c)

785.398

d)

3141.593

13.

A cruise ship has a large, circular window. It has a diameter of 8 meters. What is the window's area?

a)

31.25 m2

b)

29.55 m2

c)

30.36 m2

d)

50.27 m2

14.

Mr. Smith wants to cover his circular pool. If the pool has a diameter of 13 feet how much fabric would he need to cover the pool? (round to the nearest whole number)

a)

41 ft2

b)

133 ft2

c)

250 ft2

d)

531 ft2

15.
Is the red line a radius or diameter of the circle?
a)
Radius
b)
Diameter
16.
Is the red line a radius or diameter of the circle?
a)
Radius
b)
Diameter
17.
A circular swimming pool is 21 feet in diameter.
How many feet around is the pool?
a)
10.5 ft
b)
42 ft
c)
65.94 ft
d)
131.95 ft
18.
What is the distance around a circle?
a)
Circumference
b)
Area
c)
Diameter
d)
Radius
19.
A car wheel has a diameter of 75 cm. What is the circumference of the wheel?
a)
235.5 cm
b)
245.5 cm
c)
215.5 cm
d)
225.5 cm
20.
Daniel wants to buy cookies for her friend. The
radius of a cookie is 5 inches. What is the cookie’s 
circumference?
a)
10 in
b)
2.5 in
c)
15.7 in
d)
31.4 in 
21.

Tom has a circular garden, and he wants to place a fence around it. The circular garden has a radius of 5 meters. What is the circumference of the circular garden? (Use 3.14 for pi)

a)

30.4ft

b)

30.4m

c)

32m

d)

31.4m

22.

Cynthia wants to buy a round photo frame for her brother. The radius of the photo frame is 9 cm. What is the photo frame’s circumference?

a)

28.26 cm

b)

56.52 cm

c)

4.5 cm

d)

18 cm

23.

The ratio of circumference to diameter is a universal constant called . . .

a)

Theta

b)

Beta

c)

Epsilon

d)

Pi

24.
What is the "formal" definition of pi?
a)
22/7
b)
3.1415926
c)
the ratio of a circle's circumference to its diameter
d)
the surface area of a sphere of diameter 22/7