6.若实数x,y满足约束条件$\left\{\begin{array}{l}x+y≤4\\ x-2y-4≤0\\ x≥1\end{array}\right.$,则点P(x,y)落在圆(x-1)2+(y-3)2=4内的概率为( )
0 245910 245918 245924 245928 245934 245936 245940 245946 245948 245954 245960 245964 245966 245970 245976 245978 245984 245988 245990 245994 245996 246000 246002 246004 246005 246006 246008 246009 246010 246012 246014 246018 246020 246024 246026 246030 246036 246038 246044 246048 246050 246054 246060 246066 246068 246074 246078 246080 246086 246090 246096 246104 266669
A. | $\frac{π}{27}$ | B. | $\frac{2π}{27}$ | C. | $\frac{π}{9}$ | D. | $\frac{2π}{9}$ |