Today Is Pi Day: Gadgets for Math Nerds to Celebrate [PICTURES]

Pi Day is a yearly celebration of that useful, yet irrational and never ending number (3.14159265359). Pi is used to calculate the ratio of a circle's circumference to its diameter. The number has become an integral part of geometry, trigonometry and physics. But for die-hard fans, pi is much more than that. It's a predictable challenge, a constant that has a wild sort of beauty.

Pi Day was first officially celebrated on a large scale in 1988 at the San Francisco Exploratorium. Since then, Pi Day has been celebrated by millions of students and math-lovers. The day is celebrated on 3/14, since 3, 1, and 4 are the three most significant digits in the decimal form of pi.

On the evening of Pi Day, March 14, here are some weird Pi gadgets, mobile cases, t-shirts and much more that you would have probably not seen before. Awaken the math geek within you with these awesome images in the gallery below.

Happy Pi Day!

Pi Kindle Case

Pi Mobile Case

Pi Mobile Case

Pi Mobile Case

Pi Mobile Case

Pi Mug

Pi Bag

Pi Earrings

Pi Pencils

Pi Speakers

Pi Pizza Cutter

Pi Shower Curtain

Pi Perfume

Pi Ice Cube Tray

Pi Necklace

Pi Bowl

Pi Clock

Pi Tote Bag

Pi Bib

Pi Cuff

Pi Brooch