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Bridge pic.
Author:
Donald Powers
Bridge I worked on, in NYC 1962 to 64. I'm getting old. Took up Math to keep my mind sharp.
GeoGebra
New Resources
Parallelograms: Quick Investigation
Explore the invariant lines of matrix {{-2,5},{6,-9}}
Variation Theory Parallelogram Proofs
Icosahedron1
Shadow of a Cube (v2)
Discover Resources
Sample 1
circle
Tutorial_01
Snowflakes
blank worksheet
Discover Topics
Prism
Translation
Integers
Differential Calculus
Curve Sketching