Question

The radius of a circle was increased, due to which the circle’s area doubled. By what factor was the radius increased?

Answer 1

Answer:

So when you double the radius, the area goes up by 4 times because 2 squared is 4. The area will always go up by the square of how much the radius goes up. By contrast, the circumference will only double -- from 12.56 to 25.12 because you do not square the radius (or diameter) -- you just multiply it by pi.

Step-by-step explanation:

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