What is Non-Euclidean Geometry?

Question

What is Non-Euclidean Geometry?

In: 408

Answer 1

There are three types of curvature: Zero curvature, a flat surface like a sheet of paper; Positive curvature, like a ball or sphere; and negative curvature, like a saddle or Pringle chip.

Non-Euclidean geometry describes the second and third kinds I listed, which affects what things like polygons and parallel lines look and act like.