Is math hard, or is it just me?

:/

Can someone please help me?

I'm not sure if this is the right section, but I am in Pre-Algebra, and this is what our teacher assigned us.

This is one of the questions I was stuck on.

We have to use a2+b2=c2 formula...basically the pythagorean Theorem.

Billy and Sam drew a scaled map of their town to determine who lives closer to the Arcade, a favorite week end meeting place for Billy and Sam.The following grid shows where Billy and Sam live and also where the Arcade is located. Each unit on the grid represents 1/2 mile

http://i49.tinypic.com/6h6drs.png

1. How far is Sam's house from the arcade?

2. How far is Billy's House from the arcade?

3. How far do Sam and Billy live from one another?

PLEASE SHOW YOUR WORK!!!

Sorry, I am new. :(

Oh, and my username is very correct, idumbo. :(