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In the diagram, K, O, and M are the centers of the three semi-circles. Also, OC  = 42 and CB = 56. What is the area of the shaded region?

 

 Dec 4, 2020
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OC = 42        CB = 56

 

AB = 2(OC + CB) = 176             AO = AB/2 = 88

 

AK = 1/2(AB - CB) = 60

 

Radii are:    28, 60, and 88

 Dec 5, 2020

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