

Geometry: Incenter, Incircle, Inradius of a triangle, Theorems
and Problems.




Proposed Problem 40.
Triangle, Incenter, Excenter, Angles 80, 40, Distances. 

Proposed Problem 39.
Triangle, Incenter, Incircle, Bisector, Cyclic Quadrilateral and angles. 

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

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

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

Proposed
Problem 35.
Incenters and Inradii in Cyclic Quadrilateral. 

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

Problem 32.
Triangle, Cevian, Incircles, Tangents. 

Problem
31. Right Triangle, Incircle, Collinears.
Problem
30. Right Triangle, Incircle, Inradius. 

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

Problem 29:
Geometry Help.
Facts you should know. 

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

Proposed Problem 27
Right Triangle, incircles and inradius. 

Proposed Problem 26
Right Triangle, altitude, incircles and
inradius. 

Proposed Problem 25
Right Triangle, altitude, incircles and
inradius. 

Proposed Problem 24
Right Triangle, altitude, incircles and
inradii. 

Proposed Problem 23
Right Triangle, altitude, incircles and
inradii. 

Proposed Problem 22
Right Triangle, altitudes, incircles and
inradii. 

Proposed problem
20
Right Triangle, incircles and inradii. 

Geometric Art: Inscribed Circle, Incircle for Kids, Delaunay Triangulation. 

First AjimaMalfatti Point
Animated illustration. 

Second
AjimaMalfatti Point
Interactive illustration. 

Feuerbach Points and NinePoint Circle with interactive
animation, manipulation, and stepbystep construction.
Incenter, Incircle, Excircles. 

Incenter, Excenter, Incircle, Excircle Using TracenPoche Dynamic
Software
StepbyStep construction, Manipulation, and animation. 

Three Tangent Circles Theorem Using TracenPoche Dynamic Software
StepbyStep construction, Manipulation, and animation.
Incenter of a triangle. 
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