Today's date, 9/16/2025, is Pythagorean Day because 9 - 16 - 25 are the squares of the sides of the 3 - 4 - 5 right-angle triangle. This year is particularly special because 2025 is also the square of 45.
Read more at: https://www.npr.org/2025/09/16/nx-s1-5535545/pythagorean-triple-square-day-9-16-25
Adjunct faculty member of the University of Redlands, School of Business.
Retired Quality Engineering Manager - Abbott Labs (32 years).
Favorite classes to teach: Management Science, Statistics, Operations Management, Analytics.
Contributor to the Online Encyclopedia of Integer Sequences (OEIS) https://oeis.org/.
(Image: By Hans-Peter Postel - Own work, CC BY 2.5, https://commons.wikimedia.org/w/index.php?curid=1739679) A high-school math fan of mine ...
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