Without using distance formula, show that the points `(-2, -1), (4, 0), (3, 3) and (-3, 2)` is vertices of a parallelogram.

Without using distance formula, show that points (-2, -1) , (4, 0) , (3, 3) " and " (-3, 2) are the vertices of a parallelogram.

Show that points P(1,-2), Q(5, 2), R(3, -1), S(-1, -5) are the vertices of a parallelogram.

Show that the points A(7, 3), B(6, 1), C(8, 2) and D(9, 4) taken in that order are vertices of a parallelogram.

Show that the points (2,-1,3), (4,3,1) and (3,1,2) are collinear.

Show that P(3,4), Q(7, -2), R((1,1) and S(-3, 7) are the vertices of a parallelogram.

Prove that the point (-2,-1),(1,0),(4,3)a n d(1,2) are the vertices of parallel-gram. Is it a rectangle?

Using section formula , show that the points A(7,-5),B(9,-3) and C(13,1) are colliner.

If A(-2, -1), B(a, 0), C(4, b) and D(1, 2) are the vertices of a parallelogram, find the values of a and b.

Find the area of the square formed by the points (0, -1), (2, 1) (0, 3) and (-2, 1) as vertices.