Show that the points (1,2,3), (2,3,1) and (3,1,2) form an equilateral triangle.

Show that the points (1,2,3),(2,3,1) and (3,1,2) from an equilateral triangle.

Show that the points (1, 2, 3), (2, 3, 1) and (3, 2, 1) form an equilateral triangle.

Show that the points (2,4),(2,6) (2+sqrt3,5) form an equilateral triangle.

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

I : The points (-2,3,5 ), (1,,2,3 ),(7,0,-1 ) are collinear. II: The points (2 ,-1,1 ) (1-3-5 ), (3,-4,-4 ) form an equilateral triangle.

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

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

Show that the points A=(1,2,3),B=(7,0,1), C=(-2,3,4) are colinear.