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Problem 369. Intersecting circles, Chord, Center, Angle, Congruence.
Level: High School, College, SAT Prep.

In the figure, circles O and O' are intersecting circles at points A and B, and the center O is on the circle O'. A chord AC meet circle O' at D. Prove that BD and CD are congruent.
 

Intersecting circles, Chord, Angle, Congruence 


 

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