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二面角与平面的法向量
Author:
Rui
,
jjx01
Topic:
Solids or 3D Shapes
GeoGebra
New Resources
異分母分數減法
判斷球體
錐體建築師
四邉形 (四年級) 教師版
球体的体积推导（优化版）
Discover Resources
色彩視覺藝術：奇幻光圈
方向導數 (Directional Derivative)
Sectors 扇形
二倍角的余弦公式的证明
了解圓方程(2)的副本
Discover Topics
Linear Equations
Geometric Mean
Median Line
Dilation
Vectors