Find the areas of the quadrilaterals the coordinates of whose angular points, taken in order, are
(-1,6),(-3,-9),(5,-8) and (3,9).

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

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)

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

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