



 
Hi Carol, We didn't get your picture but I think the circles have the same centre and the diagram looks like this. A drew in radii of the two circles and labeled some points. You are to find the area of the region shaded gray, the region between the two circles. Let R be the radius of the larger circle and r be the radius of the smaller circle. Use the formula for the area of a circle to write an expression for the area of the gray region. Write the expression for Pythagoras theorem applied to the right triangle ABC. Does this help?  


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