Album: Digital downloads

Description: Eight Perfect Shuffles diagram with both white and black background.

Description: Two vector graphic digital prints showing a classic visual proof the theorem of Nicomachus that the sum of the first n positive cubes is the square of the sum of the first n positive integers. One print has a black background and the other has a white background. These can be printed at any scale.

Description: This is a construction that can be done with straightedge and compass dividing a circle into three equal area pieces.

Description: Two vector graphic digital prints showing a classic visual proof of the fact that the sum of the first n positive integers is n(n+1)/2. One print has a black background and the other has a white background. These can be printed at any scale.

Description: Two vector graphic digital prints showing a classic visual proof for determining the area of a circle with radius r using wedges. One print has a black background and the other has a white background.

Description: This is a print showing the Kurshak tiling of the dodecagon. From this tiling, you can see/prove that the area of the unit dodecagon is exactly 3.

Description: Two vector graphic digital prints showing a classic visual proof for the Pythagorean theorem One print has a black background and the other has a white background. These can be printed at any scale.

Description: A printable trigonometry diagram showing one way to think about the six standard trigonometry functions. Implicit in this diagram are three important trigonometric identities for calculus.

Description: This is a printable pdf of the Spiral of Theodorus. This shows the constructability of the square roots of 1 to 17 (and higher if you continue). This would make a great poster for a classroom.