Diffentiate of euclidean and non euclidean geometry?

Geometry that is not on a plane, like spherical geometry

The two commonly mentioned non-Euclidean geometries are hyperbolic geometry and ellptic geometry. If one takes "non-Euclidean geometry" to mean a geometry satisfying all of Euclid's postulates...

true

Non-Euclidean geometries are based on the negation of his parallel postulate (his fifth postulate). The other Euclidean postulates remain.A rephrasing of Euclid's parallel postulate is as follows:For...

fishsticks