## Task 6 - 140736

Claudia tells her friend Sabine that she has drawn a triangle $A B C$ in which the altitude from $A$ to $B C$ passes exactly through the intersection of the perpendicular bisector of $A B$ and the angle bisector of $\angle A B C$.

Sabine claims that from this information alone, one can determine the size of the angle $\angle A B C$ without seeing the drawing.

Investigate whether Sabine's claim is correct! If this is the case, determine the size of $\angle A B C$!