Pythagorean Theorem Day August 15, 2017 T-Shirts-TH

Solid colors: 100% Cotton; Heather Grey: 90% Cotton, 10% Polyester; All Other Heathers: 65% Cotton, 35% Polyester, Imported, Machine wash cold with like colors, dry low heat, Pythagorean Theorem Day or Pythagoras Theorem Day is celebrated when the sum of the squares of the first two digits in a date equals the square of the last digit in the date. Pythagorean Theorem Day 2017 Tee Shirts, Lightweight, Classic fit, Double-needle sleeve and bottom hem