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The Chordal Spirograph
Author:
Ewan Kummel
GeoGebra
New Resources
Explore the invariant lines of matrix {{-2,5},{6,-9}}
Variation Theory Parallelogram Proofs
Parallelograms: Quick Investigation
Dissections by Guillermo Bautista
alg2_05_05_01_applet_exp_flvs
Discover Resources
true/Thales1.ggb
Problem from March 23
Altitudes in a Triangle
Where to Sit?
sum of angles
Discover Topics
Boxplot
Constructions
Centroid or Barycenter
Triangles
Planes