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椭圆内切圆链
Author:
孟宝兴
GeoGebra
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画直线等分三角形的面积
球體建築師
兩組對邊相等和有直角的四邊形
拼砌四邊形
四邉形 (四年級) 教師版
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挑战中考压轴题1.1.3
正四面體
Beemo
sin,cos比大小
伸縮變換的副本
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Intersection
Cuboid
Function Graph
Symmetry
Poisson Distribution