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Perimeter

Author:Janice Wong, Anthony OR 柯志明

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四邊形的特性
近似值：有效數字
畫出對稱圖形
兩組對邊相等的四邊形
兩組對邊相等和有直角的四邊形

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徐州市初二年级期末试题
圓周角
glt-h02-00-正方形折成三角錐
滑桿動畫示範-1
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Distributions
Indefinite Integral
Vectors 3D (Three-Dimensional)
LCM and GCD
Surface

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