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Help please 2. By what factor does the area change if the radius is doubled? Explain.
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Help please
2. By what factor does the area change if the radius is doubled? Explain.

Help please 2. By what factor does the area change if the radius is doubled? Explain-example-1
User Nitish
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1 Answer

4 votes
The area of a circle with radius
r is
\pi r^2. If the radius is doubled, then the area would become
\pi(2r)^2=4\pi r^2. So the area would be increased by a factor of 4.
User Vanest
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