Triangles: Theorems and Problems 37

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Sawayama -Thebault's theorem Triangle.

Second Ajima-Malfatti Point, Triangle center.
Interactive illustration.

Proposed Problem 38.
Right Triangle, altitude, incircles, incenters, and angles.

Proposed Problem 37.
Right Triangle, altitude, incircles, incenters, and orthocenter.

First Ajima-Malfatti Point. Triangle center.
Animated illustration.

Proposed Problem 36.
Right Triangle, altitude, incircles and inradii.

Triangle and Squares 19  

Lemoine Theorem

Triangle and Squares 18  Sangaku Problem

Triangle and Squares 17

Triangle and Squares 16

Blanchet Theorem
Triangle, Altitude, Angle bisector.

Proposed Problem 34.
Right triangle, cevian, incircles, tangents and inradius.

Proposed Problem 33.
Triangle and quadrilateral.

Problem 32.
Triangle, Cevian, Incircles, Tangents.

Proposed Problem 29.
Right Triangle, altitude, incircle and inradius. Ten conclusions.

Problem 29: Geometry Help.
Facts you should know.

Heron's Formula with medians 

Triangles and Lissajous Art  

Pascal's Mystic Hexagram Theorem Proof

Proposed Problem 28
Right Triangle, altitude, incircles and inradius.

Proposed Problem 27
Right Triangle, incircles and inradius.