2 years ago

If the radius of a circle is doubled, how does the area of the circle change?

1 answer:

7 0

If the radius of a circle is doubled, the area of the circle is quadrupled.
area of a circle = 2(pi)(radius)^2
when r = 2, area = 8pi
when r = 4, area = 32pi
you can see that the area is quadrupled

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