![](../landscape/landscape_px1.gif) |
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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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![Elearning 117 Areas](../problem/p117_area_triangle_elearn_17.jpg) |
Proposed Problem 117. Area
of triangle, incenter, excircles, tangent.
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![Elearning 114: Area](../problem/p114_area_triangle_elearn_17.jpg) |
Proposed Problem 114. Area of
triangle, incenter, incircle, excircle.
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![Elearning 113: Areas](../problem/p113_area_triangle_elearn_17.jpg) |
Proposed Problem 113. Area of
triangle, incenter, incircle, excircle.
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![Contact Triangle Area. Elearning.](../problem/p110_area_contact_triangle_17.jpg) |
Proposed Problem 110. Area of
Contact Triangle. Incenter, Incircle. |
![Elearning 96](../problem/p096_parallelogram_elearning_17.jpg) |
Proposed Problem 96. Similar
Triangles, Incenters, Parallelogram. |
![Problem 95, Elearning](../problem/p095_similarity_elearning_17.jpg) |
Proposed Problem 95. Similar
Triangles, Inradii, Parallel. |
![](../puzzle/p086_intouch_extouch_17.jpg) |
Intouch and Extouch Triangles. Puzzle cut: 20 Piece Classic
Based on Proposed Problem 86. |
![](../problem/p086_extouch_triangle_17.jpg) |
Proposed Problem 86. Intouch and
Extouch Triangles, Areas. |
![](../puzzle/p085_contact_triangle_17.jpg) |
Contact Triangles. Puzzle cut: 22 Piece Polygons
Based on Proposed Problem 85. |
![](../problem/p085_contact_triangle_17.jpg) |
Proposed Problem 85. Contact
Triangles Areas, Incircle, Excircle. |
![](../problem/p084_contact_triangle_17_.jpg) |
Proposed Problem 84. Contact
Triangles Areas, Incircle, Excircle, Inradius, Exradius. |
![Contact triangle area](../problem/p082_contact_triangle_17.jpg) |
Proposed Problem 82. Area of the
Contact Triangle, inradius, circumradius. |
![Triangle area](../problem/p081_triangle_area_17.jpg) |
Proposed Problem 81. Area of a
triangle, side, incircle, incenter, inradius, circumradius. |
![](../problem/p080_triangle_area_17.jpg) |
Proposed Problem 80. Area of a
triangle, side, incircle, incenter,, inradius. |
![](../problem/p079_triangle_similar_17.jpg) |
Problem 79: Triangle.
Similarity, Altitudes, Orthocenter, Incenter, Incircles, Inradii. |
![Proposed Problem 68](../problem/p068_triangle_incircle_17.jpg) |
Proposed Problem 68: Triangle, Incircle, Inradius, Tangent, Similarity.
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![](../problem/p064_triangle_incircle_17.jpg) |
Proposed Problem 64: Triangle, Incircle, Transversal. |
![](../problem/p052_triangle_angle_tutor_1.jpg) |
Proposed Problem 52: Triangle, angles, incircle.
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![](../puzzle/sangaku_problem_170.jpg) |
Puzzle: Sangaku Problem. Incircles, incenters, |
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