n각뿔의면의수,꼭지점의수는n+1,모서리수는2n이므로n+1+n+1+2n=38이므로n은9이므로9각뿔,n각기둥의면의수는n+2,꼭지점2n,모서리3n,n+2+2n+3n=38,n=6,6각기둥
당신은 어느 그룹입니까?