Trine

A trigon is a right triangle with a side length of 240 cm. From the Wiki article - https://ru.wikipedia.org/wiki/Triangle The definition of “trigon” was introduced into mathematics almost two thousand years ago and enshrined in the definition of the term in the school course arithmetic. However, a completely different essence is often attributed to him, associated with the performance of rituals three days after the full moon. Where did this strangeness come from?