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Ext angle cyclic quad
Author:
Big Lee
GeoGebra
New Resources
画直线等分三角形的面积
找出對稱軸
三位數除以一位數（一）
【案例】圆柱体内放置一个大球六个小球
畫出對稱圖形
Discover Resources
Quadratic Function Calculator 二次函數計算器
旋轉動畫
o'clcok
以 Unit Circle 了解 Sine 的正/負的副本
五星红旗
Discover Topics
Tangent Function
General Quadrilateral
Difference and Slope
Reflection
Mathematics