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Twelve Days of Triangular Numbers
Author:
John Golden
Topic:
Numbers
...and a partridge in an array!
GeoGebra
New Resources
Ellipse as Envelope - Correspondence Method
Witch of Agnesi - A Classical Construction
Limaçon / Cardioid as a Locus - A Classical Construction
Viviani's Window
van Aubel's Theorem
Discover Resources
Altitude of a Triangle
Lab 3.5
Step 1
quadratic
Summary - Angles
Discover Topics
Cosine
Statistical Characteristics
Matrices
Congruence
Secant Line or Secant