100以内尺规只能等分这些.3,4,5,6,8,10,12,15,16,17,20,24,25,30,32,34,40,48,50,51,60,64,68,75,78,80,85,96,100只有这些能做的出来!对于边数是质数的正多边形,当且仅当其边数是形如2^(2^n)+1的费尔玛质数时,才能用...