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What happens to the area of a circle when the radius is tripled

What happens to the area of a circle when the radius is tripled
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2 votes
What happens to the area of a circle when the radius is tripled

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User Carlita
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2 Answers

5 votes
the area is multiplied by 9 (I'm pretty sure)
answered
User Jack Dorson
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9.3k points
5 votes
A = pi*r^2
ATriple = pi*(3r)^2 = 9*pi*r^2 = 9 A

Triple the radius, increase the area by a factor of 9.

i hope this has helped!
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User The Real Napster
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8.6k points
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