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![Go Geometry Education: Orthocenter](h_triangle_center_910.jpg)
Plane Geometry: Circumcircle, Circumradius of a triangle, Theorems and Problems
4
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Circumcircle of a triangle -
Table of Content 4
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![Circumcircle Index](circumcircle_index_1.jpg) |
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![Triangle, Circumcenter, Angle](../problem/p476_triangle_circumcircle_.jpg) |
Problem 476.
Triangle, Circumcenter, Circumcircle, Angles. |
![Triangle Brocard point](../education/p457_triangle_brocard_1.jpg) |
Proposed Problem 457.
Triangle, First Brocard Point, Congruent angles, Circle,
Circumcircle,
Circumradius,
Circumcenter. |
![Circumradius, Circumcenter, Triangle](../problem/p426_circumradius_cevian_17.jpg) |
Proposed Problem 426.
Triangle, Circumcircle, Circumradius, Circumcenter, concurrent Cevians. |
![Area of a triangle, Circumcircle, Angle Bisector](../problem/p401_area_triangle_17.jpg) |
Proposed Problem 401.
Area, Triangle, Angle bisector, Circumcircle, Perpendicular bisector,
Congruence.
Puzzle
based on poblem 401. |
![Triangle, Orthocenter](../problem/p393_triangle_orthocenter_1.jpg) |
Proposed Problem 393.
Triangle, Orthocenter, Circumcircles, Congruence, Collinear. |
![Triangle with squares, Circumcircles](../problem/p370_triangle_square_circle.jpg) |
Proposed Problem 370.
Triangle with squares, Circumcircles, Tangent circles. |
![Triangle, Circumcenter, Incenter, Excenter, Collinear](../problem/p320_triangle_incenter_17.jpg) |
Proposed Problem 320.
Triangle, Circumcircle, Incenter, Excenter, Collinear points. |
![](../puzzle/euler_line_nine_point_170.jpg) |
Puzzle: Euler Line and Nine Point Center
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![](../geometry/schiffler_point_euler_17.jpg) |
Schiffler Point: Four Euler Lines with interactive animation and
manipulation.
Circumcircle, Circumcenter, Centroid, Orthocenter, and Incenter. |
![Interactive Simson Line](../geometry/interactive_simson_line_17.jpg) |
Interactive Simson Line. Dynamic
Geometry.
Step-by-Step construction, Manipulation, and animation.
Circumcircle, Circumcenter O. |
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