Resources tagged with: Non Euclidean Geometry

There are 2 NRICH Mathematical resources connected to Non Euclidean Geometry, you may find related items under 3D Geometry, Shape and Space.

Broad Topics > 3D Geometry, Shape and Space > Non Euclidean Geometry

When the Angles of a Triangle Don't Add up to 180 Degrees

Age 14 to 18

This article outlines the underlying axioms of spherical geometry giving a simple proof that the sum of the angles of a triangle on the surface of a unit sphere is equal to pi plus the area of the. . . .

Geometry and Gravity 1

Age 11 to 18

This article (the first of two) contains ideas for investigations. Space-time, the curvature of space and topology are introduced with some fascinating problems to explore.