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Non-obvious Geometrical Properties of a Triangle
Author:
Gabriel Chacón
Euler's line. Feuerbach's Circle found by Poncelet & J.C. Brianchon (1785-1864)
GeoGebra
New Resources
Icosahedron1
Poorly Drawn Parallelograms 3
Dissections by Guillermo Bautista
Exploring the Area of a Triangle
Quiz: Finding Average Rate of Change
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Tangent properties
Unit circle
Reaction Time Project
Area function
Funnel
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Cosine
Random Variables
Linear Functions
Expected Value
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