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Orthocentre

Author:uccke

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找出對稱軸
畫出對稱圖形
【案例】2018年全国1卷理科12题
兩位數除以一位數（二）
第八周作业

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標準分解式與方根化簡
圓面積的展開
Angle between a Line and a Plane
以多維度解釋標準差
C60足球模型（多边形）

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Equilateral Triangles
Sine
Integers
Median Line
Hyperbola

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