# Geometry

Geometry began as measuring land and became the study of shape and space. For two thousand years people tried to derive Euclid’s fifth postulate from the others. In the nineteenth century it turned out that it cannot be derived, and other consistent geometries exist.

Connects to:
- [Number and proportion](https://mapideas.org/i/mat_ratio)
- [Orbits](https://mapideas.org/i/as_orbits)
- [Time and motion](https://mapideas.org/i/ti_relativity)
- [Who chooses the axioms?](https://mapideas.org/i/q_math_choose)
- [Perspective](https://mapideas.org/i/ar_perspective)
- [Architecture](https://mapideas.org/i/ar_arch)

Sources:
- [Wikipedia: Non-Euclidean geometry](https://en.wikipedia.org/wiki/Non-Euclidean_geometry)
- [Wikipedia: Geometry](https://en.wikipedia.org/wiki/Geometry)

Source: https://mapideas.org/i/mat_geometry · open on the map: https://mapideas.org/#mat_geometry