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Problem 296: Intersecting Circles, Chord, Radius, Angle, Perpendicular.
Level: High School, College, SAT Prep.

In the figure, the circles O and Q intersect at A and B. C is a point on circle O. Lines AC and BC meet circle Q at points D and E, respectively. Prove that lines OC and DE are perpendicular.  See also: Geometric art Mobile Apps.


Circles, Chord, Radius, Perpendicular

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