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Why I see a double image of the moon in a window?
Author:
Giovanni Organtini
GeoGebra
Multiple images
This activity has been triggered by a question on X (formerly Twitter) by Joe Milliano
New Resources
Explore the invariant lines of matrix {{-2,5},{6,-9}}
alg2_05_05_01_applet_exp_2_flvs
Icosahedron
alg2_05_05_01_applet_exp_flvs
Quiz: Finding Average Rate of Change
Discover Resources
trou
Similarity
Sazo Robby - Ch 8 GeoGebra
Hole 10
Sasha_Rieser_Geogebra_Quiz
Discover Topics
Median Line
Conic Sections
Parametric Curves
Pyramid
Square