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Heron formula

Author:ralphchen

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圓的基本性質
常见四边形是否是双心四边形
科氏力 (Coriolis Force)
平行線的斜率
三角函数的副本

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線性組合2：三角形
布丰投针实验
計算在區域內部的圖形總數的副本
P4 4N6 分數的種類及轉換 / Fraction Types and Their Conversions
描点法绘制函数图象，以一次函数为例
重叠形成的四边形

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Trigonometry
Angles
Quadrilaterals
Line Segment
Arithmetic Operations

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