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Tangent perpendicular to radius
Author:
Big Lee
GeoGebra
New Resources
找出對稱軸
四邊形的特性
【案例】2013年安徽高考15题
畫出對稱圖形
三位數除以一位數（二）
Discover Resources
立體錯覺樓梯(使用透視法會稍有差距)
圓周 (圖形B)
ycmc P5 Math lesson 1-3
正方体内切球
sin(x) 的函數圖形的副本
Discover Topics
Perimeter
Subtraction
Cube
Vectors 2D (Two-Dimensional)
Power Functions