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?

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 the points A(1,2,3),B(-1,-2,-1),C(2,3,2) and D(4,7,6) are the vertices of a parallelogram ABCD, but it is not a rectangle.

If the point (x ,-1),(3, y),(-2,3),a n d(-3,-2) taken in order are the vertices of a parallelogram, then find the values of xa n dydot

Show that the point (3,-2),(3,2),(-1,2) and (-1,-2) taken in order are the vertices of a square.

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.

Show that the points A (1,1,1), B (1,2,3) and C (2,-1,1) are vertices of an isosceles triangle.

Show that the points (-3,0), (1,2), (5,-6) and (1,-8) taken in order to form a rectangle.

The point A(1,2), B(2,-3), C(-1,-5) and D(-2, 4) in order are the vertices of