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1989全国文18
Author:
常振虎
GeoGebra
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【案例】2013年安徽高考15题
漂亮的摇摆曲线
三位數除以一位數（一）
多邊形的面積
探究三角形的全等條件
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费马点
Locus: Equidistance From Two Intersecting Lines
縫衣針
製作對稱圖形 LEVEL 2
固定三角形的條件−題1的副本
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Upper and Lower Sum or Riemann Sum
Solids or 3D Shapes
Dilation
Variance
Coordinates