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三角形的內心----紀算補習班|量身客製
Author:
ginwha
GeoGebra
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球体的体积推导
找出對稱軸
球体的体积推导（优化版）
柱體建築師
兩組對邊相等的四邊形
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從 12 面體、20 面體到 C60 C80
指數與對數
volume of tetrahedron and parallelepiped
線性規劃(半平面)
三角形全等的理由 – 題2的副本
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Geometry
Fractions
Parametric Curves
Diagrams
Limits