AB BC and AD CD Triangles A B C and A D C share side A C. Line X is drawn from point B to point B to form 4 triangles. What additional information would make it immediately possible to prove that triangles AXB and CXB are congruent using the HL theorem? What additional information would make it immediately possible to prove that triangles AXD and CXD are congruent using the SSS congruence theorem