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congruent (AAA) 2
Author:
Ricky Chan
GeoGebra
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三位數除以一位數（一）
直角坐標平面上的旋轉變換
兩位數除以一位數（一）
GeoGebra笔记功能体验课件
【案例】圆柱体内放置一个大球六个小球
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初二奥数：全等三角形
量度的誤差 Errors in Measurement
Rolling Square
Rotation of line
兩條直線垂直應用
Discover Topics
Piecewise Functions
Sequences and Series
Incircle or Inscribed Circle
Multiplication
Conic Sections