3. Converse of the Pythagorean Theorem

On Jan 9th, we learned about the converse of the Pythagorean Theorem, which are the Pythgorean triples.  It is still in your textbook chapter 8-2.  Look closely at example 4 in page 443.

Here's a website I found to explain it:

http://www.mathsisfun.com/pythagorean_triples.html

Basically, you are looking at three numbers like these:  3, 5, 4
And ask this question:  Can these three numbers form a right triangle?
You then plug it into the Pythagorean theorem formula, choosing the biggest number as "c"
Your answer will be a yes or no.


Here's a youtube video I found as well to explain it:
http://www.youtube.com/watch?v=2Kc1xbC9nAE


Classwork: page 444 #19-27,  #16, 18 are extra credit