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15 August 2017 or as the Americans would phrase it 8/15/17 is a date made of three values that form a Pythagorean Triple. In other words: , and consequently form three sides of a right-angled triangle. The mathematical properties of this date are much more rare than the more well-known Pi-Day (March 14 or 3.14 each year).
In celebration of this day, the Mathematics Department planned a range of activities in the Aula Foyer and classes were encouraged to attend throughout the morning. There were tangrams and proofs of Pythagoras’ Theorem using area, knotted strings with an Egyptian history that generated right-angled triangles, and a variety of numerical exercises that linked Pythagoras’ Theorem to the Middle Ages and even the Indian Veda texts.
A great deal of fun was had by all those involved, including the staff, who got into the spirit of the day by wearing T-shirts made especially for the day – even though it is rumoured that some of the staff would have been hard pressed to explain the theorem’s significance. Even the Principal, Herr Bachmeier, and the school’s management joined in.
The day was a great success and my gratitude goes to all those who made the day possible.
The German version of this article will be available shortly