Asked by Anonymous
The circumference of a certain circle is doubled. By what factor is its area increased?
Answers
Answered by
Savio
C=2*pi*r
If you were to double the circumference, since the only variable in the equation is r, that means the radius is double. Since A=pi*r^2, if the radius is double the area is the square of double or quadrupled so it increases by a factor of 4
If you were to double the circumference, since the only variable in the equation is r, that means the radius is double. Since A=pi*r^2, if the radius is double the area is the square of double or quadrupled so it increases by a factor of 4
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