一个正十边形的某一边长为8cm,其中一个内角的度数为144º,则这个正十边形的周长和内角和分别为( )
A.64cm,1440º | B.80cm,1620º | C.80cm,1440º | D.88cm,1620º |
17-18八年级上·湖北·课后作业 查看更多[2]
更新时间:2017-12-02 13:44:41
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【推荐1】如图,在正八边形中,连接
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【推荐2】如图,木工师傅从边长为90cm的正三角形木板上锯出一正六边形木块,那么正六边形木板的边长为( )
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【推荐1】如图,
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【推荐2】将等边三角形、正方形、正五边形按如图所示的位置摆放,如果
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