Posted by Kim on .
The radius of circle A is 9 times greater than the radius of circle B. Which of the following statements is true?
A.The area of circle B is 9 times greater than the area of circle A
B.The area of circle A is 9 times greater than the area of circle B.
C.The area of circle B is 81 times greater than the area of circle A.
D.The area of circle A is 81 times greater than the area of circle B.

Math 
PsyDAG,
Area = π r^2
Does that help you?