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梯形面積(求上底)
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lkkbmaths teachers 檔案儲存用
GeoGebra
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異分母分數減法
柱體建築師
兩位數除以一位數（二）
兩組對邊相等的四邊形
【案例】圆柱体内放置一个大球六个小球
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正餘弦函數的疊合102.11.27
四下_四邊形(學生版)
三角形
Area of Triangle
江苏高考物理最后一题模拟
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Similarity Transformation or Similarity
Optimization Problems
Hyperbola
Numbers
Angles