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This printable supports Common Core Mathematics Standard HSG-GMD.A.1

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# Diameter and Circumference (Grade 9)

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## Diameter and Circumference

1.
What is the circumference of a circle with a diameter of 4 inches?
1. 13.5 in
2. 12.6 in
3. 11.2 in
4. 12.3 in
2.
What is the radius of a circle with a circumference of 30.4 feet?
1. 4.8 ft
2. 3.4 ft
3. 6.3 ft
4. 9.7 ft
3.
Charlotte measures the distance from the center of a circular garden to its edge and finds it is 43 meters. How long is the path which goes around the outside of the garden?
1. 90 m
2. 135 m
3. 180 m
4. 270 m
4.
What is the circumference of a circle with a diameter of 18 inches?
1. 14.2 in
2. 28.3 in
3. 56.5 in
4. 63.8 in
5.
The hand on a clock is 4 inches long and just fits inside the clock face. What distance does the tip of the clock hand travel during each revolution?
1. 25 in
2. 13 in
3. 4 in
4. 8 in
6.
The blade on a helicopter is 3.2 meters long. If the blades turn at 450 revolutions per minute how fast is the tip of the bade traveling?
1. 151 m/s
2. 70 m/s
3. 430 m/s
4. 15.1 m/s
7.
Find the diameter of a circle with a perimeter of 25.
1. 3
2. 6
3. 8
4. 7
8.
Find the circumference of a circle with a radius of $3/(2pi)$.
1. $(3pi^2)/2$
2. $3$
3. $2/3$
4. $.4$
9.
What is the radius of a circle with a circumference of 14?
1. $(2pi)/14$
2. $(2pi)/7$
3. $14/pi$
4. $7/pi$
10.
What is the distance around a circular track with a radius of 67 feet?
1. 421 ft
2. 360 ft
3. 118 ft
4. 512 ft
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