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Author:antidoctor

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近似值：有效數字
判斷球體
兩組對邊相等的四邊形
Nested spiral octagon
小数的副本

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AREA
量角器3
蛇形排数
對稱之美
圆与圆的位置关系

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Parallelogram
Geometry
General Quadrilateral
Arithmetic Mean
Square

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