Online Geometry: Triangles, Theorems and Problems

Triangles Theorems and Problems- Page 24

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.