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The First Lester Circle
Author:
Steve Phelps
Topic:
Circle
The Fermat Point and the Negative Fermat Point are concyclic with the Nine-point center and the Circumcenter.
GeoGebra
New Resources
Reflection Across 2 Parallel Lines
Untitled
Exploring GeoGebra for the First Time
Reflection across a line
Reflection = 180° Rotation about a Line
Discover Resources
Geometrisk sted: sirkel og midtnormal
Congruence Transformation #2
Triangle and straight line angles
#45 'Cube' and circles
Superficie Convexa 1
Discover Topics
Similar Triangles
Incircle or Inscribed Circle
Algebra
Combinatorics
Diagrams