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Plane Geometry: Open Problems, High School, College
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Open Geometry Problems - Index 8
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College Geometry Online
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Geometry Problem 658.
Post
a solution
Triangle, Altitudes, Diameter, Circle, Angles. |
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Geometry Problem 633
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Triangle, Parallel Lines, Intersecting Lines. |
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Geometry Problem
586
Post a solution.
Cyclic Quadrilateral, Diagonals, Any Point, Circumcenters, Circumcircles, Concurrency. |
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Problem 488.
Post a solution.
Triangle, Cevian, Concurrency, Circle, Circumcircle. |
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By Antonio Gutierrez
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