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Circumference
Test Description: Find radius, diameter,and circumference of circles using 3 for pi
Instructions: Answer all questions to get your test result.
1) What is the circumference of a tire with a diameter of 12 inches?
A
36
B
48
C
24
D
6
2) What is the radius of a circle with a diameter of 20 inches?
A
30
B
10
C
40
D
60
3) What is the circumference of a circle with a radius of 12?
A
72
B
36
C
6
D
24
4) What is the circumference of a circle with a radius of 7 feet?
A
42
B
14
C
3.5
D
28
5) What is the radius of a circle with a diameter of 36 inches?
A
6
B
16
C
12
D
18
6) What is the circumference of a circle with a diameter of 30 centimeters?
A
50
B
60
C
90
D
15
7) Is the diameter of a tire less than, greater than, or equal to its circumference?
A
equal
B
less than
C
greater than
D
not enough information
8) What is the diameter of a tire with a radius of 11 inches?
A
33
B
5.5
C
121
D
22
9) Your favorite CD has a radius of 9 centimeters. What is the circumference of the CD?
A
54
B
4.5
C
18
D
27
10) Which is true about the radius and diameter?
A
The radius is two times the size of the diameter.
B
The diameter is half the size of the radius.
C
The diameter is two times the size of the radius.
D
The radius and diameter can sometimes be equal.
*select an answer for all questions
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