what is B in LABC Share with your friends Share 0 Sunanta Meitei answered this Dear user!B in ∠ABC represents the vertex where BA and BC are the arms of the angle. 4 View Full Answer flames... answered this VERTEX 1 Palak Saxena answered this well,its a vertex 1 Soham Arora answered this it is a vertex 0 Ujjwal Pandey answered this vertex 0