挑战习题
1/5单选题
难度:

1.一个多边形截去一个角后,形成另一个多边形的内角和为720°,那么原多边形的边数为(  )
A 5
B 5或6
C 5或7
D 5或6或7
提示1:
IOmmluWFiOaxguaWsOWkmui+ueW9oueahOi+ueaVsA==
提示2:
IOWGjeWIhuS4ieenjeaDheWGteiuqOiuuu+8jOWkmuS6huS4gOi+ue+8jOi+ueaVsOS4jeWPmO+8jOi/mOaYr+WwkeS6huS4gOi+ue+8nw==
正确答案:RA==
6Kej77ya6K6+5paw5aSa6L655b2i55qE6L655pWw5pivbu+8jOWIme+8iG4tMu+8iSYjODIyNjsxODA9NzIw77yM6Kej5b6X77yabj02PGJyPuWboOS4uuaIquWOu+S4gOS4quinkuacieS4ieenjeaIquazle+8iOinhumikeS+i+mimDHmnInor6bop6PvvInvvIzmiYDku6Xljp/lpJrovrnlvaLnmoTovrnmlbDkuLo15oiWNuaIljc=