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反射定律 Law of Reflection
Author:
W.L. Wong, Albert
GeoGebra
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球體建築師
判斷球體
兩組對邊相等的四邊形
兩位數加法
画直线等分三角形的面积
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三角形的外心軌跡
反射變換
L形分割
折扣 例1的副本
圖二 的複本
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Vectors
Percentages
Centroid or Barycenter
Prism
Logic