Question

The circle will be enlarged by a scale factor of 4.

a circle with radius of 3 inches.

what will be the area of the new circle?
12 pi square inches
36 pi square inches
124 pi square inches
144 pi square inches

Answer 1

The area of the new circle is 144 pi square inches

we know that

If two figures are similar, then the ratio of its areas is equal to the scale factor squared

Let

z-----> the scale factor

x-----> the area of the enlarged circle

y-----> the area of the original circle

so z²=x/y

x=16*9pi=144pi

Step-by-step explanation:

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