alt Hacker News> Humans are interested in geometry because we’re interested in building things in the real world.
To clarify and be fair, the people who actually invented geometry, or at least worked on the majority, were never interested in building things. Or at least that wasn't their primary concern.
It's more accurate to say that mathematicians were just interested in intellectual exploration, everyone else was interested in building things, and there's an uneasy alliance between the two that is about to be shattered.
Geometry wasn’t invented by mathematicians, it was invented by surveyors, architects, and engineers. These folks were developing and using geometry to build things and to parcel the land for agricultural planning for thousands of years before Euclid came along.