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Review 15

Total questions: 15

Worksheet time: 51mins

Name
Class
Date
1.

The radius of a circle is ​ (a)   the diameter.

Choose from the below words
half
twice
triple
2.

What is the area of this circle?

a)

201.06 square meters

b)

50.24 square meters

c)

123.12 square meters

d)

25.12 square meters

3.

A circle has a diameter of 17 inches. What is the area?

a)

26.69 in2

b)

226.87 in2

c)

72.25 in2

d)

53.38 in2

4.
What is the circumference of this circle ?
a)
3.14 cm 
b)
37.68 cm
c)
24 cm
d)
68.4 cm
5.
If my radius is 10ft, what is my diameter?
a)
20ft
b)
5ft
c)
31.4ft
d)
62.8ft
6.
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
7.
Does this picture show the diameter or radius of a circle?
a)
Diameter
b)
Radius
8.
Does this picture show the diameter or radius of a circle?
a)
Diameter
b)
Radius
9.
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)
9.42 m
c)
12 m
d)
18.84 m
10.

 What is the formula for circumference of a circle given the diameter?

a)

C = π r

b)

C = π d

c)

C = 2 π r

d)

C = 2 π d

11.

If you are given the diameter, how can you calculate the radius?

a)

Multiply the diameter by 2

b)

Subtract 2 from the diameter

c)

Add 2 to the diameter

d)

Divide the diameter by 2

12.

How do you find the area of a circle?

a)

πd2\pi d^2

b)

2πr2\pi r

c)

2π22\pi^2

d)

πr2\pi r^2

13.

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

14.

Ms. Green is using a compass to find her way out of the woods. The compass has a radius of 4 centimeters. What is the compass's area?

a)

49.2 cm2

b)

45.6 cm2

c)

50.24 cm2

d)

55.9 cm2

15.
The largest cookie ever baked measured a radius of 51 feet.  Which of these is the closest to the area of the cookie?  
a)
2601 ft²
b)
8167 ft²
c)
2042 ft²
d)
162 ft²