Site Navigation
Categories:
Elementary geometry
Axiomatics of Euclidean geometry
Non-Euclidean geometry
Mathematics articles needing expert attention
Articles needing expert attention
Pages needing expert attention

Summary Of: Parallel postulate

A geometry where the parallel postulate cannot hold is known as a... s parallel postulate is often stated in a similar form known as...

Encyclodia Page On: Parallel postulate

These Are Links To Other Documents
| WikiProject Mathematics | Mathematics Portal | WikiProject | portal | If the sum of the interior angles α and β is less than 180°, the two straight lines, produced indefinitely, meet on that side. | | geometry | Euclid | Euclid's Elements | axiom | Euclidean geometry | line segment | lines | right angles | non-euclidean geometry | absolute geometry | neutral geometry | If the sum of the two interior angles equals 180°, the lines are parallel and will never intersect. | | converse | elliptic geometry | angles | triangle | right angles | exterior angle | interior angles | mathematician | John Playfair | parallel | self-evident | unconsciously | angles | triangle | similar | congruent | circumscribed | quadrilateral | right angles | distance | right-angled triangle | Pythagoras' Theorem | area | Omar Khayyám | Girolamo Saccheri | logically consistent | Nikolai Ivanovich Lobachevsky | János Bolyai | Carl Friedrich Gauss | Lobachevsky | Riemann | Poincaré | hyperbolic geometry | spherical geometry | independence | Eugenio Beltrami | 1868 | Schopenhauer | Schopenhauer's criticism of the proofs of the Parallel Postulate | history of non-Euclidean geometry | doi | Lewis Carroll | ISBN 0-486-22968-8 | Categories | Elementary geometry | Axiomatics of Euclidean geometry | Non-Euclidean geometry | Mathematics articles needing expert attention | Articles needing expert attention | Pages needing expert attention |
This article is licensed under the GNU Free Documentation License. It uses material from the Wikipedia article "Parallel postulate".