The Rhind Mathematical Papyrus is the oldest manuscript written in algebra and trigonometry, dating back to 3,550 years ago.

It shows that the Egyptians used first-order equations, geometric series and a second-order algebraic equation, related to the Pythagorean theorem a² + b² = c²

It also describes how to obtain an approximation of π accurate to within less than 1% and one of the earliest attempts at squaring the circle. https://image.nostr.build/9d8f3e9fe06fcd938a8657a2334600e3a30f967e517b5430fc8f083012f09e4a.jpg