What happens to the area of a circle when the radius is tripled?
A) The are is multiplied by 3.
B) The are is multiplied by 9.
C) The area is divided by 3.14
D) The area is divided by 3.

Question

What happens to the area of a circle when the radius is tripled?                                                     
A) The are is multiplied by 3.                                 
B) The are is multiplied by 9.                                 
C) The area is divided by 3.14                               
D) The area is divided by 3.

parthkohli · Answer

As the area is basically squared, then area would increase by 3^2 = 9....Area would be multiplied by 9

anonymous · Answer

multiplied by nine, or 3 squared right?