1. It is possible to tessellate in non-Euclidean geometries such as hyperbolic geometry. 2. This article is about triangles in Euclidean geometry except where otherwise noted. 3. Muslim mathematicians introduced Euclidean Geometry , Spherical trigonometry and Arabic numerals in China. 4. Non-Euclidean geometry stimulated the development of differential geometry which has many applications. 5. This is analogous to the relationship between Euclidean geometry and non-Euclidean geometry . 6. As well as group theory, he is also interested in Euclidean geometry . 7. The non-Euclidean geometry that Lobachevsky developed is referred to as hyperbolic geometry. 8. The steps of this theorem require nothing beyond basic constructive Euclidean geometry . 9. A great deal of Euclidean geometry carries over directly to elliptic geometry. 10. The very nature of Euclidean geometry seems to change with such software.