Show that the point `A(-4, 9, 6), B(-1,6,6), C(0,7,10) form a right angled isosceles triangle.

Show that the points (2, 3, 5), (-1, 5, -1) and (4, -3, 2) form a right angled isosceles triangle.

Show that the points (-2,5),(3,-4),(7,10) form a right angled isosceles triangle.

Show that the points (4,4), (3,5), (-1,-1) form a right angled triangle.

Show that the lines x-7y-22=0, 3x+4y+9=0 and 7x+y-54=0 form a right angled isosceles triangle.

Show that the points (1,3),(3,-1),(-5,-5) form a right angled triangle.

I : The points (2, -2), (-1, 2), (3, 5) are the vertices of a right angled isoceles triangle. II : The points (2, -4), (4, -2), (7, 1) form an isosceles 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 A(1,2,7),B(2,6,3) and C(3,10,-1) are collinear.