DISCLAIMER: These example sentences appear in various news sources and books to reflect the usage of the word ‘pi'.
Views expressed in the examples do not represent the opinion of Vocabulary.com or its editors.
Send us feedback
Learn these words relating to pi, the mathematical constant and the 16th letter of the Greek alphabet. Pi Day is celebrated on March 14th, or 3/14, the date that corresponds to the first (and most well-known) digits in the decimal form of Pi.
If you feel obtuse when it comes to angles, review this list of geometry terms. You'll learn about planes, polygons, perimeter, and more. It's as easy as pi!