Geometry Problem 1404: Three Circles, Center, Intersecting Points, Collinearity, Congruence
Proposition
The figure below shows
points A and B on a circle of center O. Circle of center A and radius AB
cuts circle O at C. Circle of center B and radius BA cuts circle O at D.
BO extended cuts circle A at E. Prove that the points C, D, and E are
collinear.
Poster of Geometry Problem 1404: Sketching, Typography using iPad Apps
See also:
Art of problem 1404, Circle Patterns using Mobile Apps.
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