解:(1)由图可知,A(-3,2)B(-4,-3)C(-1,-1);(2)如图所示:(3)S△A1B1C1=S矩形DEB1F-S△DCA1-S△C1EB1-S△A1FB1=5×3- 1 2 ×2×2- 1 2 ×2×3- 1 2 ×1×5= 13 2 .