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滚动的三角形
Author:
朱亮
GeoGebra
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【案例】2013年安徽高考15题
兩組對邊相等的四邊形
找出對稱軸
柱體建築師
錐體建築師
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百分數：折扣、盈利與虧損
三角形的外接圓
磁磚著色
直角三角形の三角比
Quiz on Addition and Subtraction of Directed Numbers (1)
Discover Topics
Area
Quadrilaterals
Correlation
Translation
Integral Calculus