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元旦快乐（制作：孟宝兴）
Author:
孟宝兴
GeoGebra
New Resources
找出對稱軸
画直线等分三角形的面积
第八周作业
兩組對邊相等和有直角的四邊形
GeoGebra笔记功能体验课件
Discover Resources
Circle on a Sphere
拋物線教學_2016
arithmetic operation
賺賠：例2的副本
正餘弦函數的疊合
Discover Topics
Rectangle
Piecewise Functions
Parametric Curves
Fractions
Circle