Find the areas of the triangles the coordinates of whose angular points are respectively.
(a, c + a), (a,c) and (-a,c-a).

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) .

Using the method of integration,find the area of the triangle ABC, coordinates of whose vertices are A(1,2),B(2,0) and C(4,3)

Using the method of integration find the area of the triangle ABC, coordinates of whose vertices are A(2,0),B(4,5) and C(6,3) .

Find the area of the triangle whose vertices A, B, C are respectively, (3, 4), (-4, 3) and (8, 6) .