# geometry

Pronunciation: US say "jee-AH-muh-tree" /d͡ʒiˈɑ.mə.tɹi/; UK say "jee-OM-i-tree" /d͡ʒiːˈɒm.ɪ.tɹi/; AUS say "jee-OM-uh-tree" /d͡ʒiːˈɔm.ə.tɹi/

## Noun

1. The branch of mathematics that studies spatial relationships, such as the lengths, angles, and positions of lines and figures.
   - Simple: The part of math that studies shapes, lines, angles, and space.
   - _Architects use geometry to work out the angles and lengths of a sloping roof._
   - _She took geometry in tenth grade and loved writing proofs._
2. The spatial features of an object or system, such as its shape, size, and layout, whether measured or specified.
   - Simple: The shape, size, and layout of a thing, as measured or as planned.
   - _Engineers changed the geometry of the wing to cut drag at high speed._
   - _Mountain bikes and road bikes have very different frame geometries._
3. A mathematical system of spatial relationships built on its own set of axioms; also, the part of geometry that studies one or more systems of that kind.
   - Simple: A math system about space, built on its own starting rules, or the study of systems like it.
   - _On the surface of a sphere, spherical geometry treats great circles as its straight lines._
   - _Nineteenth-century mathematicians showed that consistent non-Euclidean geometries could exist._
4. In algebraic geometry, a mathematical object made up of representations of a space together with its spatial relationships.
   - Simple: In advanced math, an object that stands for a space and how its parts relate.

## Origin

From Middle English gemetry, geometrie, from Old French geometrie, from Latin geōmetria, from Ancient Greek γεωμετρία (geōmetría, "geometry, land-survey"), from γεωμέτρης (geōmétrēs, "geometer, land measurer"), from γῆ (gê, "earth, land, country") + -μετρία (-metría, "measurement"), from μέτρον (métron, "a measure"). It is a doublet of gematria.

Source: DictionaryAI, https://dictionaryai.com/define/geometry (written from Wiktionary data, CC BY-SA 4.0: https://creativecommons.org/licenses/by-sa/4.0/).