B4L8r
Equations changed nothing. What they represented did.
Euclid conceived a point in space, then another and another. Next he moved the points closer together, thereby creating a line. Then he repeated this scenario w/points north to south from the endpoints of his initial line. Lastly, he enclosed his first 3 lines w/a 4th line, giving us a Square; a two dimensional shape! Further he expanded his concept to create a Cube, a three dimensional shape.
The astounding genius of Euclid (as well as the Greeks of Antiquity) created Geometry, the linchpin of Engineering which allowed us to create the structures of the modern world.