SOLUTION: if the radius of a circle is increased 100% , the area of the circle is increased ( 400% ) how did we get that answer ?? thank you ..

SOLUTION: if the radius of a circle is increased 100% , the area of the circle is increased ( 400% ) how did we get that answer ?? thank you ..

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Question 1055761: if the radius of a circle is increased 100% , the area of the circle is increased ( 400% )
how did we get that answer ??
thank you ..
Answer by josgarithmetic(39617) (Show Source): You can put this solution on YOUR website!
A is original area and 4A is the new area.

Calculating for the new area,

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