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拋物線動點軌跡
Author:
張建賢
GeoGebra
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【案例】2013年安徽高考15题
多邊形的面積
祖冲之的期望：内棋与外棋
第八周作业
球体的体积推导（优化版）
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曲線
正四面體的反射對稱
Prism and Cylinder 3
课题
任務2的副本
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Cylinder
Matrices
Rational Numbers
Parametric Curves
Solids or 3D Shapes