Without using the pythagorus, show that the points (4, 4), (3, 5) and (-1, -1) are the vertices of a right angled triangle.

Without using the Pythagoras theorem, show that the points (4, 4), (3, 5) and (-1,1) are the vertices of a right angled triangle.

Show that the points (3, 4), (8, -6) and (13, 9) are the vertices of a right angled triangle.

Show that the points (2,4,3),(4,1,9) and (10,-1,6) are the vertices of an isosceles right angled triangle.

Show that the points : A (0,1,2),B(2,-1,3) and C (1,-3,1) are vertices of an isosceles right angle triangle.

Verify that (0, 7, 10) , (-1,6,6) and (-4, 9,6) are the vertices of a right angled triangle.

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 (1, 7), (4, 2), (-1,-1) and (-4, 4) are the vertices of a square.

Verify the following: (0, 7, 10), (-1,6, 6) and (- 4, 9, 6) are the vertices of a right angled triangle.

Are the points A (3, 6, 9), B (10, 20, 30) and C (25,- 41, 5) the vertices of a right-angled triangle ?

By using the concept of slope, show that the points (-2,-1), (4,0), (3,3) and (-3,2) are the vertices of a parallelogram.