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wing tsoi
GeoGebra
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探究三角形的全等條件
漂亮的摇摆曲线
兩位數除以一位數（二）
画直线等分三角形的面积
讀磅
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Quiz on Addition and Subtraction of Directed Numbers (1) 有向數加減測驗(1)
congruent (AAA) 2
橢圓包絡線1060406
手机下载课件
同角三角函数的基本关系（正六边形记忆法）
Discover Topics
Perimeter
Similarity Transformation or Similarity
Probability
Arithmetic
Limits