I originally took this photo for its repetition. Today, I post it as a series of circles to commemorate the pi day for this century. The date 3/14/15 (at least in the US, where the dates are written with the month first) matches the first 5 digits of pi (3.1415), the ratio of a circle’s circumference to its diameter.
Get Presenter Updates
Keep up to date with our FREE monthly newsletter.