My favorite Greek thinker

My favorite Greek thinker is Euclid. Euclid invented geometry. Without Euclid we wouldn't have shapes. People in the whole world would have never known what shapes were. Constructors wouldn't know how to build anything because everything they build is a shape they also wouldn't know what size does it have to be so it could fit correctly. For example, a door is a rectangle. We wouldn't know how to make money because we don't know what shape it is. Like, a dollar is rectangular and the coins are a circle. This is why Euclid is my favorite greek thinker