Online Geometry

Triangles: Theorems and Problems 28

Triangles

Geometry Problem 137

Proposed Problem 137. Orthic Triangle, Altitudes, Perpendicular, Incircle, Collinear Points, Parallelogram.  

Geometry Problem 136

Proposed Problem 136. Orthic Triangle, Altitudes, Perpendicular, Concyclic Points.  

Geometry Problem 135

Proposed Problem 135. Orthic Triangle, Altitudes, Perpendicular, Parallel  

Geometry Problem 134

Proposed Problem 134. Orthic Triangle, Altitudes, Angle Bisectors, Orthocenter, Incenter.  

Pappus Theorem

Pappus Theorem. Dynamic Geometry.
Step-by-Step construction, Manipulation, and animation.

Gergonne Line

Interactive Gergonne Line and Nobbs Points. Dynamic Geometry.
Step-by-Step construction, Manipulation, and animation.

Interactive Simson Line

Interactive Simson Line. Dynamic Geometry.
Step-by-Step construction, Manipulation, and animation.

Geometry problems 281-290

Triangle Word Cloud

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