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![Online Geometry](h_triangle_center_910.jpg)
Geometry: Incenter, Incircle, Inradius of a triangle, Theorems
and Problems.
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![Incenter, Incircle, Index](incenter_incircle_17.jpg) |
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![](../problem/p040_angle_170.jpg) |
Proposed Problem 40.
Triangle, Incenter, Excenter, Angles 80, 40, Distances. |
![](../problem/p039_angle_170.jpg) |
Proposed Problem 39.
Triangle, Incenter, Incircle, Bisector, Cyclic Quadrilateral and angles. |
![](../problem/p038_right_triangle_170.jpg) |
Proposed
Problem 38.
Right Triangle, altitude, incircles, incenters, and angles. |
![](../problem/p037_right_triangle_170.jpg) |
Proposed
Problem 37.
Right Triangle, altitude, incircles, incenters, and orthocenter. |
![](../problem/p023_right_triangle_inc170.jpg) |
Proposed
Problem 36.
Right Triangle, altitude, incircles and inradii. |
![](../problem/p035_cyclic_quadrilateral_1.jpg) |
Proposed
Problem 35.
Incenters and Inradii in Cyclic Quadrilateral. |
![](../problem/p034_triangle_sat_college_1.jpg) |
Proposed Problem
34.
Right triangle, cevian, incircles, tangents and inradius. |
![](../problem/p032_triangle_cevian_170.jpg) |
Problem 32.
Triangle, Cevian, Incircles, Tangents. |
![](../problem/p031_problem_incircle_170.jpg) |
Problem
31. Right Triangle, Incircle, Collinears.
Problem
30. Right Triangle, Incircle, Inradius. |
![](../problem/p029_problem_proof_170.jpg) |
Proposed Problem 29.
Right Triangle, altitude, incircle and inradius. Ten conclusions. |
![](../problem/p029_problem_help_170.jpg) |
Problem 29:
Geometry Help.
Facts you should know. |
![](../problem/p028_right_triangle_inc170.jpg) |
Proposed Problem 28
Right Triangle, altitude, incircles and
inradius. |
![](../problem/p027_right_triangle_inc170.jpg) |
Proposed Problem 27
Right Triangle, incircles and inradius. |
![](../problem/p026_right_triangle_inc170.jpg) |
Proposed Problem 26
Right Triangle, altitude, incircles and
inradius. |
![](../problem/p025_right_triangle_inc170.jpg) |
Proposed Problem 25
Right Triangle, altitude, incircles and
inradius. |
![](../problem/p024_right_triangle_inc170.jpg) |
Proposed Problem 24
Right Triangle, altitude, incircles and
inradii. |
![](../problem/p023_right_triangle_inc170.jpg) |
Proposed Problem 23
Right Triangle, altitude, incircles and
inradii. |
![](../problem/p022_right_triangle_inc170.jpg) |
Proposed Problem 22
Right Triangle, altitudes, incircles and
inradii. |
![](../problem/p020_right_triangle_inc170.jpg) |
Proposed problem
20
Right Triangle, incircles and inradii. |
![Art: Inscribed Circle, Incircle for Kids and Delaunay](../computational_geometry/delaunay-triangulation/inscribed-circle-incircle-kids-art-delaunay-1.jpg) |
Geometric Art: Inscribed Circle, Incircle for Kids, Delaunay Triangulation. |
![](ajima_malfatti_170.jpg) |
First Ajima-Malfatti Point
Animated illustration. |
![](ajima_malfatti_170_2.jpg) |
Second
Ajima-Malfatti Point
Interactive illustration. |
![](../geometry/feuerbach_points_17.jpg) |
Feuerbach Points and Nine-Point Circle with interactive
animation, manipulation, and step-by-step construction.
Incenter, Incircle, Excircles. |
![](../geometry/incenter_excenter_17.jpg) |
Incenter, Excenter, Incircle, Excircle Using TracenPoche Dynamic
Software
Step-by-Step construction, Manipulation, and animation. |
![](../geometry/three_tangent_circles_theo_.jpg) |
Three Tangent Circles Theorem Using TracenPoche Dynamic Software
Step-by-Step construction, Manipulation, and animation.
Incenter of a triangle. |
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