Posted by **Sergio** on Friday, October 24, 2008 at 12:50pm.

Both circles have the same center and radius of the larger cirlce is R. if the radius of the msaller circle is 3 units less than R, whic of the following represent the area of the shaded region?

- trig -
**Reiny**, Friday, October 24, 2008 at 12:56pm
Since diagrams do not show up, I can only guess that they probably showed the shaded area as a ring or resembling a metal washer.

take area of large circle - area of small circle

= pi(R^2) - pi(R-3)^2

expand the second term, then simplify.

See if it matches one of the answers.

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