# MPM2D1-01 Length of a Line Segment 2016-10-03

We learned how to find the length of a line segment. That required us to remember how the Pythagorean Theorem works (just for right triangles!), and how radicals work (square roots, like $\sqrt{13}$).

In the end, we settled on this formula:

$|AB| = \sqrt{(x_2-x_1)^2 + (y_2-y_1)^2}$

I assigned Page 77 #1-8 for homework and gave you about 20 minutes in class to work on it. Finish it tonight, please!