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Homework 3.2

Total questions: 45

Worksheet time: 3hrs 37mins

Name
Class
Date
1.

Given a circle with the radius of 8cm. Find the circumference of this circle. Use π as 3.14.

a)

48.0cm

b)

50.24cm

c)

25.12cm

d)

5.09cm

2.
What is the formula for circumference of a circle given the diameter?
a)
C = π r
b)
C = 2 π r
c)
C = π d
d)
C = 2 π d
3.
If the area of a circle is 25 π in² , then the diameter is?
a)
10 in
b)
5 in
c)
25 in
d)
pi in
4.
The _____ is the distance from the center to any point on the circle.
a)
diameter
b)
radius
c)
π
d)
center
5.
The distance across a circle through its center is called the _____.
a)
diameter
b)
radius
c)
π
d)
center
6.
If you are given the diameter, how can you calculate the radius?
a)
Multiply the diameter by 2
b)
Divide the diameter by 2
c)
Add 2 to the diameter
d)
Subtract 2 from the diameter
7.

The definition of circumference is

a)

distance from the center of any point on the circle

b)

distance from one point to another

c)

distance around the circle

d)

distance from the center of any point on the circle

8.

what is the definition of pi


select ALL that apply

a)

it is the sixteenth letter in the greek alphabet

b)

it has a represented value of 3.14

c)

it has a represented value of 22/7.

d)

Its something you eat...

9.

what is the formula for finding diameter

a)

r = 2 d

b)

d = 2 r

c)

a = m c2

d)

c = π 2 r

10.

what is the formula for finding radius

a)

c = π d

b)

c = 2 π r

c)

d = r/2

d)

r = d/2

11.

Find the radius of the circle

a)

20 ft

b)

10 ft

c)

5.5 ft

d)

10

12.

find the diameter of the circle

a)

1 ft

b)

4 ft

c)

4 mm

d)

2 ft

13.

what is this shape called

a)

circle

b)

semi circle

c)

moon

d)

triangle

14.

what is the formula for finding the area of a semi-circle

a)

A = π r2

b)

C = π r2

c)

A = π r2 / 2

d)

A = 2 π r

15.

what is the formula for finding area of a circle

a)

C = π r2

b)

A = π r2

c)

A = π r2 / 2

d)

C = 2 π r

16.

what is the radius of the inner circle?

a)

12 in

b)

8 in

c)

8 ft

d)

4 in

17.

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

18.

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

19.

What does C represent in the formula:

C = π·d

a)

Pi

b)

Circumference

c)

Diameter

d)

Area

20.

What does d represent in the formula:

C = π·d

a)

diameter

b)

radius

c)

pi

d)

3.14

21.

What number represents π?

a)

31.4

b)

4.13

c)

3.14

d)

34.1

22.

Find the circumference of the circle.

a)

31.4 cm

b)

78.5 cm

c)

314 cm

d)

15.7 cm

23.

Find the circumference of the circle.

a)

14.13 cm

b)

63.56 cm

c)

28.26 cm

d)

127.17 cm

24.

Find the circumference with a diameter of 18.4 km. Use 3.14 for pi.

a)

23.7 km

b)

57.8 km

c)

19.3 km

d)

59.1 km

25.

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

26.

Find the circumference with a radius of 9 mi. Use 3.14 for pi.

a)

59.1 mi

b)

113 mi

c)

26.6 mi

d)

56.5 mi

27.

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

a)

A = π·d

b)

C = 2·π·r

c)

A = π·r2

d)

C = π·d

28.

What does A represent in the formula:

A = π·r2

a)

Area

b)

Radius

c)

Pi

d)

Diameter

29.

What does r represent in the formula:

A = π·r2

a)

circumference

b)

radius

c)

diameter

d)

squared

30.

Find the area of the circle.

a)

18.84 m2

b)

113.04 m2

c)

37.68 m2

d)

452.16 m2

31.

Find the area of the circle.

a)

176.6 cm2

b)

706.5 cm2

c)

23.6 cm2

d)

50.24 cm2

32.

Find the area of the circle.

a)

9.42 cm2

b)

7.07 cm2

c)

28.26 cm2

d)

4.71 cm2

33.
What is the area of this circle?
a)
50.27
b)
78.23
c)
98.12
d)
201.06
34.
Find the area of the trapezoid.
a)
30 cm2
b)
44 cm2
c)
88 cm2
d)
22 cm2
35.
Find the area of this triangle.
a)
20 cm2
b)
35 cm2
c)
40 cm2
d)
17.5 cm2
36.
What is the area of the rectangle?
a)
15 sq cm
b)
15 cm
c)
16 sq cm
d)
16 cm
37.
What is the area?
a)
16 units
b)
8 units
c)
8 sq units
d)
12 sq units
38.
What is the area of the shaded region?
a)
14 m2
b)
120 m2
c)
106 m2
d)
134 m2
39.
What is the area of the composite shape?
a)
40ft2
b)
9ft2
c)
49ft2
d)
61ft2
40.
 What is the area of the arrow?
a)
17 in2
b)
40 in2
c)
52 in2
d)
61 in2
41.
What is the area of this shape?
a)
120 cm2
b)
124 cm2
c)
148 cm2
d)
184 cm2
42.
What is the area of the composite shape?
a)
50cm2
b)
25cm2
c)
40cm2
d)
35cm2
43.
What is the area of this shape?
a)
54 cm2
b)
45 cm2
c)
63 cm2
d)
36 cm2
44.
What is the area of the shaded region?
a)
4 cm2
b)
16 cm2
c)
8 cm2
d)
12 cm2
45.
The diagram shows the spot on a basketball court called the “key”. What is the area of the key? Use 3.14 for ∏ .
a)
284.52 ft2
b)
228 ft2
c)
317 ft2
d)
116.71 ft2