Description: A classic visual proof of the Pythagorean theorem suitable for dark shirts.
$16.00 $22.00
Description: A diagram depicting the process of eight perfect riffle shuffles on a deck of 52 cards.
Description: A Classic visual proof showing that the sum of the first n positive integers is n times n+1 divided by 2.
Description: A famous spiral construction using the pythagorean theorem to draw the square root of any value.
Description: The eight perfect shuffles design suitable for darker apparel.
Description: A circle divided into three parts
$21.00 $25.00
Description: A Tatami Diagram - Used in many visual proofs including the AM-GM inequality.
Description: A classic visual proof of the Pythagorean theorem from Zhoubi Suanjing.
Description: A visual proof showing that the area of the regular dodecagon in a unit circle is 3.
Description: A visual proof that the sum of powers of 1/4 is equal to 1/3.
Description: A visual proof of the area formula for a circle.
Description: A joke about a cow who can't do a calculation.
$23.00 $29.00
$17.00 $22.00
$35.00 $38.00
$11.00 $14.00
$20.00 $25.00
$19.00 $25.00
$18.00 $23.00
$12.00 $15.00
$2.50 $3.00