As shown in the figure, the coordinates of a, B and C are (3,0), (1, root 3), (0,1) respectively, so as to find the area of the quadrilateral oabc

As shown in the figure, the coordinates of a, B and C are (3,0), (1, root 3), (0,1) respectively, so as to find the area of the quadrilateral oabc

S=(0X0-3X0+3X√3-1X0+1X1-0X√3)/2=(1+3√3 )/2