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Energy from the sun.
作者：
Chris Hamper
Energy flow.
GeoGebra
最新資源
Area Between Two Curves
Tetrahedron String Art
Visualizing the Pythagorean Identity with Sine and Cosine
兩位數的位值
GGB is Awesome!
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Locus Art
langrage multipliers
System of Three Equations
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二次函數
平行四邊形
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