Find the areas of the quadrilaterals the coordinates of whose angular points, taken in order, are
(1,1), (3,4), (5,-2), and (4,-7).

If the area of the quadrilateral whose angular points taken in order are (1, 2), (-5, 6), (7, -4) and (h, -2) be zero, show that h=3 .

Find the equations to the sides of the triangles of the coordinates of whose angular points are respectively: (1,4),(2,-3) and (-1,-2) .

Find the areas of the triangles the coordinates of whose angular points are: (-a,(pi)/(6))(a,(pi)/(2)), and (-2a,-(2 pi)/(3))

The equation of the sides of a triangle, the coordinates of whose angular points are: (3,5),(1,2) and (-7,4) .

Find the area of the quadrilateral whose vertices, taken in order,are (-4,-2),backslash(-3,-5),quad (3,-2)quad and quad (2,3)