If A(-5, 7), B(-4,-5), C(-1, -6) and D(4,5) are the vertices of a quadrilateral, then, find the area of the quadrilateral ABCD.

Let A(3,2), B(4, 1),C(3,1), and D(2, 4) be the vertices of a quadrilateral ABCD. Find the area of the quadrilateral formed by joining the midpoints of the sides of the quadrilateral ABCD.

A=(3,5), B=(-5,-4) and C=(7,10) are the vertices of a parallelogram ABCD =

The points (5, -5, 2), (4, -3, 1), (7, -6, 4) and (8, -7, 5) are the vertices of

If A=(-3,4), B=(-1,-2), C=(5,6) , D=(x,-4) are vertices of a quadrilateral such that triangle A B D=2 Delta A C D, then x=

The angles of quadrilateral are in the ratio 3:5:9:13 . Find all the angles of the quadrilateral.

Show that the points A(1,3),B(2,6),C(5,7) and D(4,4) are the vertices of a rhombus .

The points (5,-4,2),(4,-3,1),(7,-6,4),(8,-7,5) are vertices of a:

The points A (6, 1), B (8, 2), and C 9, 4) are the three vertices of a parallelogram ABCD. If E is the midpoint of DC, find area of Delta ADE.

Prove that the points A(0,-1),B(-2,3),C(6,7) and D(8,3) are the vertices of a rectangle ABCD .