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Perpendicular lines

Author:Ng KC

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近似值：有效數字
直角坐標平面上的旋轉變換
Fibonacci Clock
找出對稱軸
Claude 解幾何題

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優良作品3(昀潔)
希瓦定理
固定周界的長方形面積變化
周界平移
angle between 2 planes 01 by Mr LO WY

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Multiplication
Histogram
Hypothesis Testing
Arithmetic Operations
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