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definition of trigo
Author:
sealion1215
GeoGebra
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兩組對邊相等的四邊形
拼砌四邊形
直角坐標平面上的旋轉變換
三位數除以一位數（二）
兩位數除以一位數（二）
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繞行
GGB-BOOK
比較角的大小
正方体展开图的副本
拋物線有範圍限制的極值
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Translation
Area
Histogram
Arithmetic Operations
Plane Figures or Shapes