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Math and geometry addicts! Text says: Don't argue with a 90 degree angle - it's always right. Great holiday or birthday gift idea for math teachers and tutors.

Tags: 90, angle, funny, geometry, humor

"Main St. Birch St. Higgins Dr. Cobalt Lane."

Tags: alias-investigations, alias, luke-cage, the-purple-man, purple

My life without you is like cos90 = 0, me and you are sin90 = 1, and beside you is tan90 = undefined. Makes an awesome gift, buy 2 or more and save on shipping

Tags: geek, trigonometrie, trigonometry-tutor, trigonometry, mathematics-symbol

Official tee for equations+!

Tags: app, android, equals, plus, equations

Science and physics humor! Great holiday or birthday gift idea for math teacher, engineer, physicist or physics professor. Text says: It's a physics thing, you wouldn't understand.

Tags: geek, algebra, calculus, education, einstein

Text says: Pi - stop being so irrational. Great Pi Day gift idea for the mathematician, math student, math tutor, math teacher or math geek

Tags: funny, trigonometry, science, school, pi-day

An alternate version if you just wanted this cool looking Bill Cipher.

Tags: gravity-falls, mabel-pines, dipper-pines, wendy-corduroy, soos

Pi rules! Show the world that you love math, algebra, calculus, geometry, trigonometry and mathematics. Great holiday or birthday gift idea for the mathematician, math student or teacher.

Tags: math, geek, algebra, because, calculus

In mathematics, the Pythagorean theorem, also known as Pythagoras's theorem, is a relation in Euclidean geometry among the three sides of a right triangle. It states that the square of the hypotenuse (the side opposite the right angle) is equal to the sum of the squares of the other two sides.

Tags: pythagoras, science, college, education, university

Text says: Pi - stop being so irrational. Great Pi Day gift idea for the mathematician, math student, math tutor, math teacher or math geek

Tags: math, trigonometry, science, school, pi-day

profesional mathematics athlete

Tags: pi-day, love, cool, cute, funny

It's horrible! The Odd-pocalypse has begun! Time is dead, and meaning has no meaning! reality is turned on it's head and Bill reigns supreme! Ladies and gentlemen; prepare for Weirdmageddon!!! Inspired by the latest Gravity Falls episode. This shirt shows Bill Cipher imprisoning Mabel in a bubble with a shooting star. I hope that she is okay. Show your support by getting this shirt. Save Mabel Pines from what ever this Weirdmageddon has in store for the Pines family and their friends. #SaveMabel.

Tags: prison, chains, epic, digital, glow

profesional mathematics athlete

Tags: pi-day, love, cool, cute, funny

In mathematics, the Pythagorean theorem, also known as Pythagoras's theorem, is a relation in Euclidean geometry among the three sides of a right triangle. It states that the square of the hypotenuse (the side opposite the right angle) is equal to the sum of the squares of the other two sides.

Tags: kathete, hypotenuse, rechter-winkel, satz-des-pythagoras, gleichung