The Simson Line: Theorems and Problems

Simson Line. A proof of Simson line with animation.

Dynamic Geometry 1448.
Simson Line. Step-by-step illustration using GeoGebra.

Dynamic Geometry 1449.
Salmon Line. Step-by-step illustration using GeoGebra.

Angle between two Simson Lines. Proof with animation.
Transversal line. 

Interactive Simson Line. Dynamic Geometry.
Step-by-Step construction, Manipulation, and animation.
Collinear Points.

Geometry Problem 1167.
Triangle, Circle, Circumcircle, Perpendicular, 90 Degrees, Collinear Points.

Geometry Problem 1059.
Triangle, Circumcircle, Orthocenter, Altitude, Perpendicular, Reflection of a Point over a Line, Collinear Points, Simson Line, Congruence.

Geometry Problem 678.
Triangle, Simson Line, Circumcircle, Tangent, Parallel, Perpendicular, Collinear Points.

Problem 493.
Right Triangle, Circumcircle, Perpendicular, Chord.

Collinear Points.
Theorems and Problems
Simson Line.

Transversal Lines.

Perpendicular lines.
Simson Line.

Triangles.

Circles.

Cyclic Quadrilateral.
Simson Line.