No matter where in the world you are or how you write the date today (15/08 or 08/15), August 15, 2017 is Pythagorean Theorem Day!
8² + 15² =17² OR 15² + 8² = 17²
This doesn’t happen every year so it’s mathematically special!
Pythagorean Theorem Day or Pythagoras’ Theorem Day is celebrated because the sum of the squares of the first two digits (8 and 15) is equal to the square of the last digit in the date (17).
The Mathletics Dictionary tell us that Pythagoras was a Greek philosopher and mathematician. He was born around 569 BC and died around 475 BC. He is most well-known for his theorem we celebrate today; c² = a² + b².
Pythagorean Theorem Mathletics sample activities
1. Pythagoras Jigsaw Puzzle: Print and cut out or Interact online
2. Printable Worksheet: (pages 5-8)
When are the next Pythagorean Theorem days?
Have your learners figure it out! Start by giving them the hint that Pythagorean Theorem Day will occur again in 2020 and 2025.
You can provide the month to make it a little easier.
- December 16, 2020 (12/16/20 or 16/12/20): 12² + 16² = 20²
- July 24, 2025 (7/24/25 or 24/7/25): 7² + 24² = 25²
Here’s how you can teach Pythagorean Theorem… with chocolate!