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劉虹圻內心

Author:呂麗珠

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拼砌四邊形
算柱 (兩位數)
近似值：有效數字
異分母分數減法
柱體建築師

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圍周
三節棍
椭圆两个焦点与椭圆上点的连线
矩形等距曲線
翰林數學_2下_CH3-1_三角形的外角定理

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Definite Integral
Trigonometry
Tangent Function
Volume
Binomial Distribution

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