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練習 - 逆時針旋轉（三角形）
Author:
Lau Sir
Topic:
Triangles
GeoGebra
New Resources
GeoGebra笔记功能体验课件
兩組對邊相等的四邊形
柱體建築師
第八周作业
三位數除以一位數（二）
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三角層疊
比較圖形大小2
圖形2
两角和的正弦公式
剪切成正三棱柱（制作：李三军，修订：孟宝兴）
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Integral Calculus
Rectangle
Plane Figures or Shapes
Real Numbers
Solids or 3D Shapes