画正多边形,HT ST CS PU PD FD BK RT LT,你知道下面LOGO语言命令的作用吗,右转起点,左转起点,如何画一个等边三角形,FD 40 RT 120,FD 40 RT 120,FD 40 RT 120,FD 40 RT 120 FD 40 RT 120 FD 40 RT 120,120,FD 40 LT 60,FD 40 LT 60 FD 40 LT 60 FD 40 LT 60 FD 40 LT 60 FD 40 LT 60,40,左转起点,FD 40 RT 120 FD 40 RT 120 FD 40 RT 120,FD 40 RT 90 FD 40 RT 90 FD 40 RT 90 FD 40 RT 90,FD 40 LT 60 FD 40 LT 60 FD 40 LT 60 FD 40 LT 60 FD 40 LT 60 FD 40 LT 60,正六边形,正N边形,3,4,N,6,120,360,90,60,360/N,360,360,360,等边三角形,正方形,正六边形,REPEAT N FD 边长 RT 360/N,REPEAT 正多边形边数FD 边长