Designed for my dear old dad for Father's Day next week. He's always thought that the Pythagorean Theorem would look cool on a T-shirt. His wish has been granted.
(My dad's a math and computer nerd, bless him.) Happy Father's Day, Dad!
Can be bought here: www.redbubble.com/people/groov…
Design © me
EDIT: Dad, loved the design but suggested a couple of lines to add on. It actually looks cooler now.