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Spinning baseball
Author:
Dave Van Leeuwen
using equations from
http://paulbourke.net/geometry/baseball/
GeoGebra
New Resources
bewijs stelling van Pythagoras
Flip A Bunch of Coins
Flip 5 Coins.
探究長方形對角線上的正方形數目
Golden Rectangles and Golden Spirals
Discover Resources
pergarus 1
Geobra calss activity 5
Triangles 1
Area between curves example 2
Number line for adding and subtracting
Discover Topics
Algebra
Parallelogram
Matrices
Functions
Sine