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What is the circumference of a circle that is 16pi. what's its radius?
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What is the circumference of a circle that is 16pi. what's its radius?

What is the circumference of a circle that is 16pi. what's its radius?-example-1
User Shahrad Elahi
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6.2k points

2 Answers

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The radius is 8 because circumference is equal to pi times the diameter and since the diameter is 16, then the radius is 8
User Ken Kin
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6.5k points
2 votes
The circumference, perimeter or length of a circle is:
L = 2*pi*r (r=radius)
Replace L=16pi into the formula and solve for r:
16pi = 2*pi*r
r= (16pi)/(2pi) = 16/2 = 8
The radius is 8
User Maarij Bhatti
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6.2k points
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