هندسهی ِ ریمانی hendese-ye Riemanni
*Fr.: géométrie riemannienne*
A → *non-Euclidean geometry* in which there are no
→ *parallel* lines, and the sum of the → *angle*s
of a → *triangle* is always greater than 180°.
Riemannian figures can be thought of as figures
constructed on a curved surface. The geometry is called *elliptic* because the section
formed by a plane that cuts the curved surface is an ellipse. → *Riemannian*; → *geometry*. |