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垂心(劉虹圻623)

Author:呂麗珠

Topic:Orthocenter

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拼砌四邊形
畫出對稱圖形
兩位數除以一位數（二）
兩組對邊相等和有直角的四邊形
近似值：有效數字

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畢氏定理
Copy of 尋找等腰三角形 Isosceles Triangle Hunt
方圓之間之二
不存在的梯子
基础知识

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Probability
Coordinates
Linear Programming or Linear Optimization
Difference and Slope
Cylinder

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