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Author:
叶卢庆
GeoGebra
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垂直線的斜率
球体的体积推导（优化版）
斜率的值
圓周公式的應用
多邊形的面積
Discover Resources
Perigal's Dissection
圓內弦中點軌跡
複合圖形(一)
ghseh 二次函數的開口方向
球体的体积推导
Discover Topics
Congruence
Exponential Functions
Trapezoid
Statistics
Vectors 2D (Two-Dimensional)