Math: If we talk about geometry then, all gone through Pythagoras theorem. Without this theorem trigonometry one of the major branches of mathematics is not possible, because all the basic formulas of trigonometry are biased on Pythagoras theorem.
Years ago, a man named found an amazing fact about If the triangle had a right and you made a square on each of the three sides, then the biggest square had the exact same area as the other two put together!
This is a visual representation of how Legos can be used to show the Pythagorean theorem. This is a great way to explain Pythagorean triples along with providing a visual for the proof of the Pythagorean theorem.