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折叠问题一例
Author:
孟宝兴
GeoGebra
New Resources
sanjiaohanshu
找出對稱軸
GeoGebra笔记功能体验课件
球體建築師
兩組對邊相等和有直角的四邊形
Discover Resources
鉛筆的長度
Trapezoid1
橢圓練習
Chords of a Circle
正方形纸片剪出正三角形（顶点在边上）
Discover Topics
Differential Equation
Rational Numbers
Probability
Mode
Area