Dimensions

At this time of year I like to show some of the Dimensions series. Beautifully designed and distributed under a Creative Commons License, the series is free to download and show in class, and gives an excellent overview of projective geometry in two, three, and four dimensions! Incidentally, the animations were created using POV-Ray, a free ray-tracing program that generates photo-realistic images using precise mathematical modeling.

Right triangle days

On Mothers Day I wrote out the date and noticed 5/12/13 could be the sides of a right triangle.  That made it doubly special – but is it really that special? How many dates have that property?  Which years have the most?  Would they be evenly distributed throughout the century? 

Fibonacci date!

Well I should have seen that coming – but we’ll be prepared next time, right?  When’s the next Fibonacci date again?