A triangle has corners at points A, B, and C. Side AB has a length of #45 #. The distance between the intersection of point A's angle bisector with side BC and point B is #6 #. If side AC has a length of #42 #, what is the length of side BC?
1 Answer
Apr 23, 2018
By the angle bisector theorem, I get
Explanation:
We call the corners "vertices" -- it sounds smarter.
Let's call the foot of A's angle bisector D. That's where it meets BC.
We're given
By the angle bisector theorem, we have proportionality