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相似双子模型（任意三角形）
Author:
冯姣龙
Topic:
Scalene Triangles
,
Similar Triangles
,
Similarity Transformation or Similarity
GeoGebra
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找出對稱軸
sanjiaohanshu
長方體平面投影 (Codex版)
錐體建築師
判斷球體
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it's for fun
乘法1
切割正二十面體(直)
求二次函数f(x)=-x^2+ax+3区间[-2,3]上的最大值
方格紙上畫平行四邊形2的副本
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Special Points
Circle
Parallelogram
Division
Parabola