Find the third vertex of a triangle if its two vertices are (-1,4) and (5,2) and midpoints of one sides is (0,3).

Find the area of the triangle whose vertices are (3, 8), (– 4, 2) and (5, 1).

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

Find the angles of the triangle whose vertices are (0,-1,-2), B(3,1,4) and C(5,7,1).

Find the area of the triangle whose vertices are :- (2, 3), (-1, 0), (2,- 4).

Find the third vertex of the triangle whose centroid is (7, -2, 5) and whose other two vertices are (2, 6,-4) and (4, -2, 3).