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二面角的平面角
Author:
sun
GeoGebra
New Resources
兩組對邊相等和有直角的四邊形
第八周作业
找出對稱軸
兩位數除以一位數（二）
球体的体积推导（优化版）
Discover Resources
三角形的分割與組合(1)
GeoGebra資料上傳
正切函數值的變化
Dispersion
图形的旋转
Discover Topics
Solids or 3D Shapes
Root
Vectors 2D (Two-Dimensional)
Multiplication
Logarithm