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Plane Geometry: Open Problems, High School, College
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Open Geometry Problems - Index 4
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![Geometry Problem 969](../school-college/p969-equilateral-triangle-rectangle-common-vertex-sum-areas-1.jpg) |
Geometry Problem 969.
Post a solution
Equilateral Triangle, Rectangle, Common Vertex, Right Triangles Areas. |
![Geometry Problem 966](../school-college/p966-triangle-cevian-midpoint-circumcircle-tangent-collinear-points-1.jpg) |
Geometry Problem 966.
Post a solution
Triangle, Cevians, Midpoint, Circumcircle, Circle, Tangent Line, Collinear Points. |
![Geometry Problem 959](../school-college/p959-triangle-ratio-side-1-4-inradius-exradius-cevian-geometric-mean-1.jpg) |
Geometry Problem 959.
Post a solution
Triangle, Sides Ratio 4:1, Inradius, Exradius, Cevian, Mean Proportional, Geometric Mean, Metric Relations. |
![Geometry Problem 955](../school-college/p955-quadrilateral-diagonal-angle-30-40-60-70-degrees-1.jpg) |
Geometry Problem 955.
Post a solution
Quadrilateral, Triangle, Diagonals, Triangle, Angles, 30, 40, 60, 70 Degrees. |
![Geometry Problem 952](../school-college/p952-triangle-3-equal-circles-tangent-incenter-circumcenter-collinear-1.jpg) |
Geometry Problem 952.
Post a solution
Triangle, Incenter, Circumcenter, Three Equal Circles, Tangent Line, Tangent Circles, Collinear Points. |
![Problem 914](../school-college/p914-triangle-orthocenter-angle-bisector-parallel-midpoint-1.jpg) |
Geometry Problem 914.
Post a solution
Triangle, Orthocenter, Angle Bisector, Parallel Lines, Midpoint.
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By Antonio Gutierrez
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