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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 186: Right triangle, circles](../problem/p186_right_triangle_17.jpg) |
Proposed Problem 186. Right
Triangle, Altitude, Incenters, Circles. |
![Elearning 186: Right triangle, circles](../problem/p186_right_triangle_17.jpg) |
Proposed Problem 186. Right
Triangle, Altitude, Incenters, Circles. |
![Elearning: Triangle, Circle, Incircle, Radius](../problem/p160_elearning_triangle_17.jpg) |
Proposed Problem 160. Triangle,
Incircle, Incenter, Circumcircle, Circumcenter, Inradius. |
![Triangle Elearning 159](../problem/p159_elearning_triangle_17.jpg) |
Proposed Problem 159. Distances
from the Circumcenter to the Incenter and the Excenters. |
![Geometry Problem 158](../problem/p158_elearning_triangle_17.jpg) |
Proposed Problem 158. Relation
between the Circumradius, Incircle, Inradius and Exradii of a triangle.
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![Elearning 155](../problem/p155_triangle_circle_17.jpg) |
Proposed Problem 155. Euler's
Theorem: Distance from the Incenter to the Circumcenter. |
![Elearning 154](../problem/p154_triangle_circle_17.jpg) |
Proposed Problem 154. Triangle,
Incircle, Inradius, Circumradius, Chord. |
![Geometry Problem 145. Elearning Triangle](../problem/p145_four_triangles_circle_.jpg) |
Proposed Problem 145. Four
Triangles, Incircle, Tangent and Parallel to Side, Incenters,
Circumcenters. |
![Geometry problem 144 Triangle](../problem/p144_four_triangles_circle_.jpg) |
Proposed Problem 144. Four
Triangles, Incircle, Tangent and Parallel to Side, Inradii. |
![Geometry problem 143](../problem/p143_four_triangles_circle_.jpg) |
Proposed Problem 143. Four
Triangles, Incircle, Tangent and Parallel to Side, Circumradii. |
![Elearning 142: Triangle area](../problem/p142_four_triangles_area_17.jpg) |
Proposed Problem 142. Four
Triangles, Incircle, Tangent and Parallel to Side, Areas. |
![Elearning 141](../problem/p141_four_triangles_incircl.jpg) |
Proposed Problem 141. Triangle,
Incircle, Tangent , Parallel, Perimeters. |
![Geometry Problem 137](../problem/p137_orthic_triangle_17.jpg) |
Proposed Problem 137.
Orthic Triangle, Altitudes, Perpendicular, Incircle, Collinear Points,
Parallelogram. |
![Geometry Problem 134](../problem/p134_orthic_triangle_17.jpg) |
Proposed Problem 134. Orthic
Triangle, Altitudes, Angle Bisectors, Orthocenter, Incenter. |
![Elearn 128: Incenter, Ratios](../problem/p128_incenter_bisector_17.jpg) |
Proposed Problem 128. Incenter of
a Triangle, Angle Bisectors, Sum of Ratios.
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![Elearn 127: Centroid, Incenter](../problem/p127_centroid_incenter_17.jpg) |
Proposed Problem 127. Centroid
and Incenter of a Triangle, Parallel, Proportions.
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![Elearn 126: Incenter Proportions](../problem/p126_incenter_proportion_17.jpg) |
Proposed Problem 126. Incenter of
Triangle, Angle Bisector, Proportions.
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Proposed Problem 120. Area
of triangle, incenter, excircles, tangent.
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![Elearn 119: Triangle area.](../problem/p119_area_triangle_incenter_17.jpg) |
Proposed Problem 119. Area
of triangle, incenter, excircle, tangent.
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![Problem 118](../problem/p118_area_triangle_elearn_17.jpg) |
Proposed Problem 118. Area
of triangle, incenter, excenter, tangent.
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