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Tangent of a Circle 圓的切線
Author:
Alex CHIK
GeoGebra
gMath 互動數學教室
http://www.geogebra.hk
New Resources
Earth with coastline
sanjiaohanshu
畫出對稱圖形
算柱 (兩位數)
小数 的副本
Discover Resources
等腰直角三角形
Copy of 三角形的面積
正立方體->菱形十二面體(滑桿動畫)
Copy of 梯形
Copy of 包含除法（1 ÷分數）
Discover Topics
Scatter Plot
Differential Calculus
Natural Numbers
Vectors 2D (Two-Dimensional)
Continuity