Pythagorean Theorem
This appears to have some extensive examples, background and even sample problems. Though I haven't explored the whole site and all of its offerings, I was impressed by it's simple and accurate description of the Pythagorean Theorem.
Here is a great link to on-line help direct from the publisher of our textbook.
You can find video tutors, practice question and practice assessments just by clicking here.
Link to AT&T service plans
Zeno’s Paradox of the Tortoise and Achilles
Achilles
When the time comes, read this article and try to decide who you think would really win the race, the tortoise or Achilles.
Geometric 3-d objects
Here is a good site for nets and 3-d geometic shapes
Need to build a graph on the computer?
First and foremost I would recommend working with Google Documents - Create New - Spreadsheet. It's free and you can access it from anywhere and on any computer. Use the included chart builder.
Other options outside of the Google world include Create-A-Graph and Chartgo that you might want to check out.
Other options outside of the Google world include Create-A-Graph and Chartgo that you might want to check out.