Math Is Fun Forum

Problem:
I am observing an Isosceles Triangle with a Vertex Angle of "B" that is half of the base angle "A".

Question: What are "A" and "B" exactly?

I have an illustration which I copied down from the board, but the triangle has no specific angles or degrees, just a "B" on the top corner, and two "A's" on the bottom two corners of a rather typical looking triangle.  Is it a trick question from my math instructor?  My gut feel is to say that "A(2)" and "B" are 180 degrees exactly.  I am unsure.