Find the area of the quadrilateral whose vertices are : `(1, 1), (7, -3), (12, 2) and (7, 21)`

If the area of the quadrilateral ABCD whose vertices are A(1, 1), B(7, -3), C(12, 2) and D(7, 21) is Delta . Find the sum of the digits of Delta .

Find the area of the quadrilateral whose vertices are : (-4, 5), (0, 7), (5, -5) and (-4, -2)

Find the area of the quadrilateral whose vertices are A(1,1),B(3,4),C(5,-2) and D(4,-7)

Find the area of the quadrilateral whose vertices are (-4,-2),(-3,-5),(3,-2),(2,3)

Find the area of the quadrilateral ABCD whose vertices are A(1,0),B(5,3),C(2,7) and D(-2,4)

Find the area of the quadrilateral whose vertices are A(-4,5), B(0,7), C(5,-5) and D(-4,-2).

Find the area of the quadrilateral whose vertices are (-3,2),(5,4),(7,-6) and (-5,-4)

Find the area of the triangle whose vertices are : (3,-4), (7, 5), (-1, 10)

Find the area of quadrilateral ABCD whose vertices are A(-3, -1), B(-2, -4), C(4, -1) and D(3, 4).