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立體

Author:tan90

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四邊形的特性
sanjiaohanshu
畫出對稱圖形
第八周作业
兩組對邊相等和有直角的四邊形

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托勒密定理的應用
二次函數05
Ext angle cyclic quad
平行四邊形面積
四角柱體（長方體）的截面

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Difference and Slope
Prism
Centroid or Barycenter
Ellipse
Addition

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