Cordinates of the vertices of the triangle `ABC` are `A(12,8),B(-2,6) ,C(6,0)` then the correct statement is:

The vertices of a triangle are A(1,-1,2),B(6,11,2),C(1,2,6) then cos A

If the co-ordinates of the vertices A,B,C of the triangle ABC are (-4, 2) , (12,-2) and (8,6) respectively, then angle B=

If the co-ordinates of the vertices A,B,C of the triangle ABC are (-4, 2) , (12,-2) and (8,6) respectively, then angle B=

The vertices of triangle ABC are A (4, 4), B (6, 3), C (2, -1), then angle ABC is equal to

The vertices of Delta ABC are A(0,6),B(8,12) and C(8,0). The cordinates of the incentre are:

The vertices of DeltaABC are A(0,6) , B(8,12) and C(8,0) . The cordinates of the incentre are: