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正20面体
Author:
2143550746
GeoGebra
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画直线等分三角形的面积
異分母分數減法
【案例】圆柱体内放置一个大球六个小球
畫出對稱圖形
四邉形 (四年級) 教師版
Discover Resources
指數函數與對數函數圖形圖形(同底)
平面幾何新路
旋轉4
七巧板（tangram）的副本
Epicycloid
Discover Topics
Integral Calculus
Linear Equations
Definite Integral
Polygons
Vectors 2D (Two-Dimensional)