1)(4)(3)(2)-3,-2-3,-2-3,-2横坐标-3纵坐标-2A(2,-2)B(5,2)C(0,2)A(2,-2)B(5,2)C(0,2)(-b,a)A(2,2)B(-2,5)C(-2,0)A(2,2)B(-2,5)C(-2,0)3303312AACCBB60D1A(,)1232?O:(0,0)A:(1/2,根号3/2)B:(1-根号3)/2,(1+根号3)/2)C:(-根号3/2,1/2 F303 323 3ADCBDCBACD BCECFD CGEACF BCG1234606060k2k3k3k2k22 k+3,-4(1,-1)(-b,a)(-2.5,4)ADCBD11224