Holidays are a good time to find the answer to complex mathematical problems using household items, MacGyver-style. One way to find pi (yes, that pi) involves a flat surface, a little twig or pin, and ...

Happy Pi Day! Isn't Pi Day one of the best holidays all year? For last year's Pi Day, I determined a value of pi without even using a circle. How can you top that? I can top it by using pi to find pi.

Tuesday is Pi Day, a national celebration of the mathematical concept, which is the ratio of a circle's circumference to its diameter and equals 3.14... Schools and museums often plan events to ...