    Circumference of a circle

Quiz by DAVID VEGA

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20 questions
• Q1
Find the circumference of the circle: r = 8cm 24
18
96
50.24
120s
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• Q2
Find the circumference of the circle: d = 36 ft 12.56
113.04
36
56.52
120s
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• Q3
Find the radius of the circle: d = 36 ft 14
18
72
38
120s
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• Q4
Find the diameter of the circle: r = 8 cm 8
10
4
16
120s
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• Q5
What does "circumference" mean?
line from one side of a circle to another
space a circle takes up
line from center of circle to side
distance around a circle
120s
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• Q6
Find the circumference (to the nearest whole number) 116 square in.
44 in
88 in
none of the above
120s
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• Q7
What is the circumference of a circle with a diameter of 1 inch? Use 3.14 for pi.
6.28 inches
31.4 inches
3.14 inches
62.8 inches
120s
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• Q8
How much does pi stand for?
4.31
1.34
3.14
3.41
120s
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• Q9
What is the circumference of this circle? 68.4 cm
3.14 cm
37.68 cm
24 cm
120s
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• Q10
A bicycle tie has a diameter of 27 inches. What is the circumference of the tire?
42.39
27.18
84.78
13
120s
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• Q11
31.4 in.
15.7 in.
10 in.
2.5 in.
120s
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• Q12
What is the circumference of the circle? r = 22 in. d = 44 in.
2.5 in.
138.16 in.
125.23 in.
222 in.
120s
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• Q13
The radius of the circle is 9 meters. What is the circle's circumference? 9 meters
56.52 meters
18 meters
28.26 meters
120s
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• Q14
Does this picture show the diameter or radius of a circle? diameter
120s
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• Q15
Does this picture show the diameter or radius of a circle? Diameter
120s
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• Q16
A bicycle tire has a diameter of 20 inches. How many inches is one full revolution of the wheel?
125.6 in.
1256 in.
62.8 in.
31.4 in.
120s
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• Q17
Other than the formula C=πd, what is another formula for circumference of a circle
C=2π
C=πd²
C=2πr
C=πr²
120s
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• Q18
14
153.86
21.98
43.96
120s
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• Q19
If my diameter is 19 inches, what is my radius?
119.32 inches
9.5 inches
38 inches
59.66 inches
120s
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• Q20
If my radius is 10 ft, what is my diameter?
20 ft
5 ft
31.4 ft
62.8 ft
120s
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