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The circumference of a circle is 3 pi miles. What is the diameter?

2 Answers

2 votes

Answer:

Diameter is 3

Explanation:

C=2πr

3π = 2πr

3π / 2π = r (Divide each side by 2π)

3/2 = r (Simplify π)

3/2 *2 = d (d = 2r)

d = 6/2 = 3

User Corey Witherow
by
8.7k points
5 votes

Answer:

3 miles

Explanation:

The circumference of a circle can be found using:

c=
\pi d

We know the circumference is
3\pi, so we can substitute that in for c


3\pi=
\pi d

We want to find the diameter. To do this, we need to get d by itself. It is being multiplied by pi. To undo this, divide both sides by pi. This will cancel pi, and leave d by itself.


3\pi /\pi =\pi d/ \pi

3=d

So, the diameter is 3 miles

User Joecks
by
8.5k points

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