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圓周率....公式...???
Dec 15th 2013, 09:03

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設半徑為r,圓周率為pi 則圓周長=2*pi*r pi=圓周長/2r(2r為直徑) 選2...

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    2016射手座運勢 射手座女生喜歡怎樣的男生 , 射手座的故事 , 射手座女生分析 , 射手座男生的愛情態度 , 射手座 | 星座運勢配對2016_星座男女配

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