XXX be the shorter XXXXXXX so XXXX ? is.
Given an angle bisector, it divides XXX opposite XXXX XXXX XXXXXXXX whose lengths XXX XXXXXXXXXXXX to the lengths of the other XXX XXXXX so XX XXX write:
XXXXX for. Write XXX cross products:
XXXXXX XXXX XXXXX by 2:
So, ? XX XXXXX XX.