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koban [17]
4 years ago
8

Find the radius of a circle with a circumference of 45pi centimeters

Mathematics
1 answer:
JulsSmile [24]4 years ago
8 0

Answer:

<h2>The radius r = 22.5 cm</h2>

Step-by-step explanation:

The formula of a circumference of a circle:

C=2\pi r

r - radius

We have the circumference

C=45\pi\ cm

Substitute:

2\pi r=45\pi               <em>divide both sides by π</em>

2r=45        <em>dvide both sides by 2</em>

r=22.5\ cm

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