一个正八边形的边长是3厘米,用一条彩带围一圈后,还多出来2厘米,这条彩带有多长?0I3Y5S4i1Y0S9M8z'D/|
算式:提示9D5J2Z3@6b4I5G;R,Z9N0I3Y5S4i1Y0S9M8z'D/|
答:这条彩带长/b4S6|)]/?1F0~1U厘米。0I3Y5S4i1Y0S9M8z'D/|