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Worksheets

Math 7

Total questions: 55

Worksheet time: 2hrs 7mins

Name
Class
Date
1.
If my radius is 10ft, what is my diameter?
a)
20ft
b)
5ft
c)
31.4ft
d)
62.8ft
2.
If my diameter is 19 inches, what is my radius?
a)
38 inches
b)
9.5 inches
c)
59.66 inches
d)
119.32 inches
3.
If my radius is 2 yd what is the circumference?
a)
4 yd
b)
1 yd
c)
12.56 yd
d)
6.28 yd
4.
If my diameter is 90cm, what is my circumference?
a)
282.6cm
b)
180 cm
c)
90cm
d)
565.2cm
5.

What is the formula for finding the circumference of a circle?

a)

C = r2

b)

C = rd

c)

A = π·r2

d)

C = π·d

6.

What does C represent in the formula:

C = π·d

a)

Pi

b)

Circumference

c)

Diameter

d)

Area

7.

What does d represent in the formula:

C = π·d

a)

diameter

b)

radius

c)

pi

d)

3.14

8.

What is the diameter of a circle?

a)

the distance around a circle

b)

the area of a circle

c)

halfway through a circle

d)

a line through the center of a circle

9.

What is the circumference of a circle?

a)

the distance around a circle

b)

the area of a circle

c)

halfway through a circle

d)

a line through the center of a circle

10.

What number represents π?

a)

31.4

b)

4.13

c)

3.14

d)

34.1

11.

Find the circumference with a radius of 5.8 cm. Use 3.14 for pi.

a)

37 cm

b)

38.3 cm

c)

36.4 cm

d)

42.7 cm

12.

Find the circumference of the circle.

a)

31.4 cm

b)

78.5 cm

c)

314 cm

d)

15.7 cm

13.

Find the circumference of the circle.

a)

38.47 cm

b)

10.99 cm

c)

43.96 cm

d)

21.98 cm

14.

Find the circumference of the circle.

a)

78.5 cm

b)

15.7 cm

c)

7.85 cm

d)

19.6 cm

15.
Determine the radius of the penny
a)
59.66 mm
b)
9.5 mm
c)
38 mm
d)
119.32 mm
16.
What is the diameter?
a)
8
b)
16
c)
10
d)
4
17.
Does this picture show the diameter or radius of a circle?
a)
Diameter
b)
Radius
18.
What is the radius?
a)
18
b)
72
c)
38
d)
14
19.
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
20.
Does this picture show the diameter or radius of a circle?
a)
Diameter
b)
Radius
21.
What does "circumference" mean?
a)
Space a circle takes up
b)
Distance around a circle
c)
Line from one side of a circle to another
d)
Line from center of circle to side
22.
Does this picture show the diameter or radius of a circle?
a)
Diameter
b)
Radius
23.
Does this picture show the diameter or radius of a circle?
a)
Diameter
b)
Radius
24.
Determine the radius of the penny
a)
59.66 mm
b)
9.5 mm
c)
38 mm
d)
119.32 mm
25.
What is the diameter?
a)
8
b)
16
c)
10
d)
4
26.
What is the radius?
a)
18
b)
72
c)
38
d)
14
27.

What two formulas can you use to find the circumference?

a)

C = π·d

b)

C = π·r2

c)

C = 2·π·r

d)

C = d2

28.

What does C represent in the formula:

C = π·d

a)

Pi

b)

Circumference

c)

Diameter

d)

Area

29.

What does d represent in the formula:

C = π·d

a)

diameter

b)

radius

c)

pi

d)

3.14

30.

What number represents π?

a)

31.4

b)

4.13

c)

3.14

d)

34.1

31.
What is the circumference of this circle?  Round to the nearest tenth.
a)
3.14 cm 
b)
37.7 cm
c)
24 cm
d)
68.4 cm
32.

Find the circumference of the circle.

a)

31.4 cm

b)

78.5 cm

c)

314 cm

d)

15.7 cm

33.

Find the circumference of the circle.

a)

78.5 cm

b)

15.7 cm

c)

7.85 cm

d)

19.6 cm

34.
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
35.

Find the circumference of the circle.

a)

38.47 cm

b)

10.99 cm

c)

43.96 cm

d)

21.98 cm

36.
Find the area of the circle
a)
43.96
b)
153.86
c)
87.82
d)
307.72
37.
Find the area of the circle
a)
56.52
b)
254.34
c)
1017.36
d)
113.04
38.
what is the area of a circle with the diameter of 10cm ?
a)
66cm
b)
78.5cm
c)
66.5cm
d)
10m
39.
find the area of the circle below.
a)
100 cm
b)
225 cm
c)
9 cm
d)
28.26 cm
40.
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
41.
a line that goes from one edge of the circle to another and crosses the center point
a)
center
b)
diameter
c)
dime eater
d)
radius
42.
a line from the center point to the edge of the circle
a)
diameter
b)
radio
c)
radius
d)
pi
43.
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
44.
What is the formula for area of a circle given the radius?
a)
A = πr
b)
A = 2πr
c)
A = πd
d)
A = πr²
45.
What is the area of a circle with a radius of 21 cm?
a)
1384.74 cm2
b)
2142.12 cm2
c)
4348.08 cm2
d)
1289.12 cm2
46.
Which of the following choices is closest to the area of a circle? (d = 9 cm)
a)
253.34 cm2
b)
63.59 cm2
c)
56.52 cm2
d)
28.26 cm2
47.
What is the area of this circle?
a)
82.13 m2
b)
78.50 m2
c)
314.16 m2
d)
170.12 m2
48.
The diameter of the face-off circle on an ice-hockey rink is 30 feet. Find its area.
a)
675.6 ft2
b)
29.67 ft2
c)
545.8 ft2
d)
706.5 ft2
49.
Shring's dining room table is round and has a radius of 4.5 feet. What is the tabletop's area?
a)
63.585 ft2
b)
68.345 ft2
c)
64.585 ft2
d)
61.345 ft2
50.
Hannah drew a circle with a radius of 30 cm. Jonas drew a circle with a radius of 20 cm. What is the approximate difference in the areas of their circles?
a)
2,826 cm2
b)
1,570 cm2
c)
1,256 cm2
d)
314 cm2
51.
What is the area of this circle?
a)
163.2
b)
15.3
c)
124.2
d)
113.1
52.
What is the area of this circle?
a)
1256.64
b)
31.41
c)
314.16
d)
123.12
53.
What is the area of this circle?
a)
6082.12
b)
1520.53
c)
1893.14
d)
1292.92
54.
What is the area of this circle?
a)
15393.8
b)
1248.12
c)
5930.12
d)
3848.45
55.
What is the area of this circle?
a)
82.13
b)
78.54
c)
314.16
d)
170.12

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