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Phone Cases

Eight Perfect Shuffles Dark Phone Case

Description: The eight perfect shuffles design suitable for darker apparel.

Eight Perfect Shuffles Dark Phone Case

$18.00 $23.00

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Eight Perfect Shuffles Phone Case

Description: A diagram depicting the process of eight perfect riffle shuffles on a deck of 52 cards.

Eight Perfect Shuffles Phone Case

$18.00 $23.00

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Pythagorean Theorem Dark Phone Case

Description: A classic visual proof of the Pythagorean theorem suitable for dark shirts.

Pythagorean Theorem Dark Phone Case

$18.00 $23.00

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Spiral of Theodorus Phone Case

Description: A famous spiral construction using the pythagorean theorem to draw the square root of any value.

Spiral of Theodorus Phone Case

$18.00 $23.00

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Finite Sums of Positive Integers Phone Case

Description: A Classic visual proof showing that the sum of the first n positive integers is n times n+1 divided by 2.

Finite Sums of Positive Integers Phone Case

$18.00 $23.00

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Cowculator Phone Case

Description: A joke about a cow who can't do a calculation.

Cowculator Phone Case

$18.00 $23.00

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Tatami Diagram Phone Case

Description: A Tatami Diagram - Used in many visual proofs including the AM-GM inequality.

Tatami Diagram Phone Case

$18.00 $23.00

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Dodecagon Dissection Phone Case

Description: A visual proof showing that the area of the regular dodecagon in a unit circle is 3.

Dodecagon Dissection Phone Case

$18.00 $23.00

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Pythagorean Theorem Classic Proof Phone Case

Description: A classic visual proof of the Pythagorean theorem from Zhoubi Suanjing.

Pythagorean Theorem Classic Proof Phone Case

$18.00 $23.00

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Circle Area Phone Case

Description: A visual proof of the area formula for a circle.

Circle Area Phone Case

$18.00 $23.00

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Geometric Sum of Powers of 1/4 Phone Case

Description: A visual proof that the sum of powers of 1/4 is equal to 1/3.

Geometric Sum of Powers of 1/4 Phone Case

$18.00 $23.00

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