题目

若一个多边形的内角和为1080°，则这个多边形的边数为【 】 A． 6 B． 7 C． 8 D． 9 答案：【答案】C。【解析】多边形内角和定理。解此方程即可求得答案：n=8。故选C。Today a lot of information can _____ online.A．receive B．be receivedC．is received D．receiving