SOLUTION: Find the area of the region between two concentric circles with radii 9 and 6.

Question 77707: Find the area of the region between two concentric circles with radii 9 and 6.
Answer by funmath(2933) (Show Source): You can put this solution on YOUR website!
Find the area of the region between two concentric circles with radii 9 and 6.
:
If "concentric" means that the smaller circle is inside the larger circle, then we subtract the area of the smaller circle from the area of the larger circle.
:
The formula for the area of a circle is A=area, r=radius, pi is approximately 3.141592654
The area of the larger circle with r=9 is:

The area of the smaller circle with r=6 is:

The difference is:

You can approximate this to whatever your teacher wants. A lot will let you use pi=3.14

Happy Calculating!!!
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