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penrose三角形

Author:宋晓燕

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兩組對邊相等和有直角的四邊形
三位數除以一位數（一）
畫出對稱圖形
直角坐標平面上的旋轉變換
小数的副本

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固定三角形的條件−題3
優良作品8(宜庭)
習作A三ch1_11
gslsb 正方形數列
z=g(x,y)函数图像

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Orthocenter
Function Graph
Differential Calculus
Complex Numbers
Surface

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