6.已知点A(2,0)A(2,0)A(2,0),B(0,2)B(0,2)B(0,2),点CCC为圆x2+y2−6x−6y+16=0x^{2}+y^{2}-6x-6y+16=0x2+y2−6x−6y+16=0上一点,则ΔABC\Delta ABCΔABC的面积的最大值为((( )))