Distance Formula between 2 points

DF1: Distance Formula Part 1: Shows how to use pythagorean theorem to derive the distance formula between 2 points, and provides one example: http://youtu.be/8r42MOXki1M

DF2: Distance Formula Part 2: Shows several examples using the distance formula to find the distance between 2 points: http://youtu.be/Zc-jusxENDM