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Author:王廷祐

Topic:Orthocenter

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畫出對稱圖形
三位數除以一位數（二）
兩組對邊相等的四邊形
錐體建築師
【案例】2018年全国1卷理科12题

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七巧板
正弦定理
平行四邊形面積
线与平面的位置关系
電子幾何條的副本

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Curve Sketching
Upper and Lower Sum or Riemann Sum
Vectors 3D (Three-Dimensional)
Mode
Parametric Curves

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