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旋轉對稱 Rotational symmetry

Author:TANG TSZ YUEN

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【案例】2013年安徽高考15题
畫出對稱圖形
三位數除以一位數（二）
柱體建築師
兩位數加法

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用極座標做時鐘
立體圓錐與斜切面關係
祖暅之《綴術》：「緣冪勢既同，則積不容異。」
螢橋國中周孟承
任意四边形各边中点的连线必构成平行四边形.许兴华数学

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Parametric Curves
Median Line
Circumcircle or Circumscribed Circle
Conic Sections
Continuity

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