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彩色莫比乌斯环
Author:
孟宝兴
GeoGebra
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四邊形的特性
直角坐標平面上的旋轉變換
算柱 (兩位數)
異分母分數減法
【案例】2013年安徽高考15题
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腳踏車痕模擬
三角函數
area 面積
正12面體
圆的面积展开的副本
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Statistics
Sine
Mathematics
General Quadrilateral
Translation