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Author:
chen mingchuan
GeoGebra
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柱體建築師
兩組對邊相等的四邊形
兩位數除以一位數（一）
兩組對邊相等和有直角的四邊形
異分母分數減法
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尺規作圖找平方根點(以根號2為例)
為甚麼二次函數中，a是正數，開口向上?
Bricks
Copy of Finding the H.C.F. and the L.C.M.
翰林數學_2下_CH3-4_三角形的外角大於任一內對角
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Special Points
Upper and Lower Sum or Riemann Sum
Standard Deviation
Indefinite Integral
Continuity