If three consecutive vertices of a parallelogram are A(4,3,5),B(0,6,0),C(−8,1,4) and D is the fourth vertex, then the angle between the lines CA and BD is:

If three consecutive vertices of a parallelogram are A(4,3,5),B(0,6,0)

1.	If three consecutive vertices of a parallelogram are A(4,3,5),B(0,6,0),C(−8,1,4) and D is the fourth vertex, then the angle between the lines CA and BD is:
Answer» If three consecutive vertices of a parallelogram are $A (4, 3, 5), B (0, 6, 0), C (- 8, 1, 4)$ and $D$ is the fourth vertex, then the angle between the lines $C A$ and $B D$ is: