

Plane Geometry: Circumcircle, Circumradius of a triangle, Theorems and Problems
4

Circumcircle of a triangle 
Table of Content 4




Problem 476.
Triangle, Circumcenter, Circumcircle, Angles. 

Proposed Problem 457.
Triangle, First Brocard Point, Congruent angles, Circle,
Circumcircle,
Circumradius,
Circumcenter. 

Proposed Problem 426.
Triangle, Circumcircle, Circumradius, Circumcenter, concurrent Cevians. 

Proposed Problem 401.
Area, Triangle, Angle bisector, Circumcircle, Perpendicular bisector,
Congruence.
Puzzle
based on poblem 401. 

Proposed Problem 393.
Triangle, Orthocenter, Circumcircles, Congruence, Collinear. 

Proposed Problem 370.
Triangle with squares, Circumcircles, Tangent circles. 

Proposed Problem 320.
Triangle, Circumcircle, Incenter, Excenter, Collinear points. 

Puzzle: Euler Line and Nine Point Center


Schiffler Point: Four Euler Lines with interactive animation and
manipulation.
Circumcircle, Circumcenter, Centroid, Orthocenter, and Incenter. 

Interactive Simson Line. Dynamic
Geometry.
StepbyStep construction, Manipulation, and animation.
Circumcircle, Circumcenter O. 
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