March 29

We will move on to talk about other properties of the triangle. One of the more useful theorem concerns when three lines drawn from each of the vertex meet at one point.
This applies to the case of all kinds of centers for the triangle, the centroid, the incenter, the circumcenter, the orthocenter, so on and so forth.

Remember Damien demonstrated the proof of why the three medians of a traingle meet at one point, the centroid at the beginning of last class. We will study the commonality among all of these centers, and come up with a much easier way of proving that.
We'll attempt to prove the same for the other centers. And leave one for you to do as homework.