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折叠问题一例
Author:
孟宝兴
GeoGebra
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四邊形的特性
異分母分數減法
兩組對邊相等和有直角的四邊形
畫出對稱圖形
直角坐標平面上的旋轉變換
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动态展示圆面积的构成
binary number system
一組物件的幾分之幾
包絡線：拋物線
游戏
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Cylinder
Angles
Inequalities
Kite
Arithmetic Mean