Question

The radius of a circle is doubled.what is the new circle to the area of the new circle
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Answer 1

Answer:

Formula is pie radius square

Step-by-step explanation:

So if you double the radius the are become quadruple

Answer 2

Answer:

1 : 4

Step-by-step explanation:

Let radius of circle = r

Area = πr²

New circle radius = 2r

Area = π (2r)²

        = 4πr²

Area of circle : Area of new circle

πr²  :  4πr²

1 : 4

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