SOLUTION: If a radius of a circle is tripled, then the area is:

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Question 129027: If a radius of a circle is tripled, then the area is:
Answer by checkley71(8403) About Me  (Show Source):
You can put this solution on YOUR website!
area=pi*r^2
if the radius is tripled then:
area=pi*(2r)^2
area=pi*4r^2 or the area is increased by 4.