This bright and bold graphic in red, sea green, and white, reads "Keep Calm and Stay Rational." All caps are used in mixed fonts and the words are accompanied by the ultimate symbol for the complete opposite of rational: the Greek letter Pi. Other graphic elements include exclamation points and Art Deco style borders.
The lowercase Greek letter Pi is used in mathematics and geometry as a symbol for the irrational constant that begins 3.14159... This irrational number is used to calculate measurements in a circle.
Get this fun, silly, and downright irrational apparel design for the math geek or science lover in your life! It's great for math teachers, mathematics students, geometry lovers, and more! Seen here on a unisex black tee, you can pick this up in styles for women or kids, and even choose different apparel styles as shown below.
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