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Circles Intro

Total questions: 21

Worksheet time: 2hrs 45mins

Name
Class
Date
1.
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
2.
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. 
3.
What is the diameter?
a)
8
b)
16
c)
10
d)
4
4.
What is the radius?
a)
18
b)
72
c)
38
d)
14
5.
Is the red line a radius or diameter of the circle?
a)
Radius
b)
Diameter
6.
Is the red line a radius or diameter of the circle?
a)
Radius
b)
Diameter
7.
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
8.
True or False: An equation for Circumference is C = πr2
a)
True 
b)
False
9.

Steven purchases a bowl. The diameter of the bowl is 14 cm. What is the circumference of the bowl?

a)

42.15 cm

b)

43.96 cm

c)

44.28 cm

d)

44.37 cm

10.

Find the circumference of a circle with a radius of 13.5 mm.

a)

84 mm

b)

84.68 mm

c)

84.78 mm

d)

85

11.

What is the circumference of a circle with a radius of 54 m?

a)

339.12 m

b)

340.56 m

c)

342.78 m

d)

345.39

12.

A cruise ship has a large, circular window. It has a diameter of 6 meters. What is the window's approximate circumference?

a)

3 m

b)

20.42 m

c)

37.68 m

d)

18.84 m

13.

Determine the radius of the penny

a)

59.66 mm

b)

9.5 mm

c)

8 mm

d)

9 mm

14.

If my diameter is 25 inches, what is my radius?

a)

50 inches

b)

12.5 inches

c)

78.5 inches

d)

25 inches

15.
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
16.
Find the circumference (to the nearest whole number)
a)
88 in
b)
44 in
c)
116 square in
d)
None of the above
17.
Alex has trained his puppy, Popper, to jump through a ring. According to Alex's measurements and calculations, the ring has a diameter of 3.5 feet. What is the ring's circumference (use 3.14 for pi)?
a)
11.32 ft
b)
12.25 ft
c)
10.99 ft
d)
8.75 ft
18.

Randy’s circular garden has a radius of 1.5 feet. He wants to enclose the garden edging that costs $0.75 per foot. About how much will the edging cost?

a)

$8.00

b)

$7.00

c)

$7.50

d)

$8.50

19.

The homeowners association wants to enclose the playground in a fence. How much fencing will they need to purchase? What is this question asking you to find?

a)

area

b)

radius

c)

diameter

d)

circumference

20.
Jayne has a very large circular lollipop that has a circumference of 25.12 inches. What would the diameter of Jayne’s lollipop be? Use π = 3.14.
a)
4 in.
b)
8 in.
c)
12 in.
d)
16 in.
21.
The circumference is 62.8 inches.  What is the radius?
a)
20 inches
b)
10 inches
c)
6.28 inches
d)
31.4 inches

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