DS is stuck on his homework, caclulating angles. He get a diagram and has to work out some of the missing angles. for questions 1-8 it was what is the angle at a or b etc - he has done all of those.
For question 9 the has to find the value of AB(with a ^)C.
Problem was we have not come across that notation before.
I think it means the angle at point B between the lines to point A and point C. Does anybody know?