Triangles are Forever!

I haven't posted to the blog in a while, but that is about to change.  Today we began the unit on triangle congruence, which is the underpinning of the rest of the course.  Nerd that I am, I had a great time proving beyond the shadow of a doubt that the measures of the angles of a triangle add up to 180˚.  Here is the solution to today's Challenger.    Can you come up with a check of the problem to make sure the answer I got was correct?  Tell me about it, and you shall be rewarded......

Check out my new Voki - and follow her instructions!