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海龟爬行
Author:
赵林
GeoGebra
New Resources
錐體建築師
球體建築師
三位數除以一位數（一）
画直线等分三角形的面积
找出對稱軸
Discover Resources
Slope of a St. Line (formula)
與兩圓相切之圓心雙曲線軌跡
cos(α) + cos(β) + cos(γ) 的對稱性
方向導數與梯度 (Gradient)的副本
达芬奇椭圆仪
Discover Topics
Calculus
Prism
Area
Cuboid
Combinatorics