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空間座標系
Author:
張雅菱
GeoGebra
New Resources
圓的切線方程
直線的斜率
球体的体积推导（优化版）
三位數除以一位數（二）
空间中两直线的位置关系
Discover Resources
黎曼和
角平分線性質
正四角柱(可旋轉)
國中統計
Angle between 2 planes
Discover Topics
Arithmetic Operations
Expected Value
Parallelogram
Limits
Subtraction