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 Problem 72. Intersecting Circles, Cyclic Quadrilateral, Angles, Parallel. Level: High School, SAT Prep, College


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 Problem 71

 

 

 

Given lines 1 and 2, circle 3 passes through the points A, B, C, and D, and circle 4 passes through the points C, D, E, and F. Prove that lines AB and EF are parallel.

 

 

 

 

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Last updated: February 23, 2008

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