can someone tell me how to do this descriptively?

Find, correct to the nearest degree, the three angles of the triangle with the given vertices.

A(0, 1, 1),B(-2, 4, 2),C(1, 1, -2),

CAB = 115

ABC = 29

BCA = 3 36

those are the correct answers....i dont think im picking the correct vertices when im doing them or im just retarded and completely missing how to do this.