1. Pythagoras’s Theorem Ah, the classic triangle’s best friend. This gem of geometry tells us that in a right triangle, the square of the hypotenuse is equal to the sum of the squares of the other two sides. From architecture to physics, it’s the go-to formula for finding balance in a chaotic world. 2. Logarithms Say goodbye to tedious multiplication and division. John Napier’s invention of logarithms