[" If "A(6,-6,0),B(-1,-7,6),C(3,-4,4)" and "D(2,-9,2)" be four points in space "],[" show that "AB perp CD]

If A (6,-6,0), B(-1,-7,6), C (3,-4, 4) and D (2,-9,2) be four points in space. Show that AB is perpendicular to CD.

If the co-ordinates of four points in space are A(6,-6,0), B(-1,-7,6), C(3,-4,4) and D(2,-9,2) then show that AB is perpendicular to CD.

If A(2, 3, 4), B(5, 4, -1), C(3, 6, 2) and D(1, 2, 0) be four points, show that vec(AB) is perpendicular to vec(CD) .

If A(4,8,12), B(2,4,6), C(3,5,4) and D(5,8,5) are four points, show that the lines vec(AB) and vec(CD) intersect.

If A(1,2,3),B(4,5,7) ,C(-4,3,-6) and D(2,9,2) are four given points then find the angle between the lines AB and CD. a) (pi)/(6) b) (pi)/(4) c) (pi)/(3) d) 0

If A(1,2,3),B(4,5,7) ,C(-4,3,-6) and D(2,9,2) are four given points then find the angle between the lines AB and CD.

A(0,5,6),B(1,4,7),C(2,3,7) and D(3,4,6) are four points in space. The point nearest to the origin O(0,0,0) is (A) A (B) B (C) C (D) D

A(0,5,6),B(1,4,7),C(2,3,7) and D(3,4,6) are four points in space. The point nearest to the origin O(0,0,0) is (A) A (B) B (C) C (D) D