The math: Why do certain regular $n$-gons tile the plane while others don't?
Professor Kellie Evans (kellie.m.evans@csun.edu)
Warm-up activity: Angle sum of a triangle.
Load GeoGebra activity
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Introduction to GeoGebra
Golden triangles
regular n-gons
Penrose and art
Lagniappe
GeoGebra
GeoGebraTube