This Sunday, March 14, 2015 is Pi Day a celebration of the infinite digits of Pi. Pi is the ratio of a circle’s circumference to its diameter.
Pi is often abbreviated to the first two digits after the decimal point or 3.14. This year (and the only time this century) the first five digits correspond to the date: 3. 1415 or 3/14/15.
In honor of Pi Day here are a few titles with a math focus to enjoy: