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p4 frame
Author:
Arthur Lee
Topic:
Symmetry
p4 frame
GeoGebra
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Roll Dice
以竹簽拼砌三角形
Flip 9 Coins
A note on Erdős’s mysterious remark
Golden Rectangles and Golden Spirals
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parametr
Consistency of Linear equations in Two Variables
Circle symmetry (1b)
Primera estelación de cúpula cuadrada
Plane Perspective: Converging lines to parallel lines
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Distributions
Sphere
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Complex Numbers
Fractal Geometry