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数学大好きな俺に数学のＳＵＧＥＥＥＥってなる事教えてくれ+雑学:哲学ニュースnwk
275： 以下、名無しにかわりましてVIPがお送りします：2011/12/26(月) 23:49:50.03 ID:Z/gq6WB30
正十七角形はコンパスと定規のみで作図可能
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