On today, which is Pi Day, each theme answer has the initials P.I.

This Thursday is Pi Day, the one day of the year ... I’ll attempt to show rather than tell an answer to that question, using two beautiful pi-centric puzzles. Even if you find them easy as ...

However, pi is a constant number and will always be the same for any circle of any size. Need a break? Play the USA TODAY Daily Crossword Puzzle. According to the official Pi Day website ...