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Q: If circle A has 4 times the radius of circle B how many times bigger is the area of circle A than circle B?

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if you double the radius (or diameter) , you get four times the area. area of a circle = pi * radius squared

The relationship between a circle's radius and it's area is: a = πr2 so if the radius of the circle increases by 7 times, the area will increase by π72 times, or 49π, which is approximately equal to 153.938

Area of a circle = pi times radius squaredDiameter of a circle = 2 times radius

In a circle, the area of the circle is pi times the radius squared

A= Area of the circle¶= Pi (About 3.14)r= Radius squared (Radius times radius)3.14 * Radius squared

The area of a circle is: pi times radius squared

For a circle or radius r, the area is given by: area = {pi}r2 (ie pi times the radius squared)

Area of a circle is pi times the radius squared.

Area of a circle: pi times radius squared

The area is (pi) times (the radius)2 , just as it is in any other circle.

Area of a circle = pi (3.14) times the radius squared.

area: pi times radius squared circumference: pi times radius

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