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梯形面積(求上底)
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lkkbmaths teachers 檔案儲存用
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兩位數除以一位數（一）
柱體建築師
三位數除以一位數（二）
畫出對稱圖形
兩組對邊相等和有直角的四邊形
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f(x) and -f(x)
conjugate
三角形的外心與外接圓
平面截正六面體
古典概型
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Diagrams
Integral Calculus
Quadrilaterals
Continuity
Statistics