The application of the methods of trigonometry and geometry to the study of such matters as the angles, sides, and areas of spherical triangles and other figures on a sphere. See also elliptic plane.
科学参考收录了60776条科技类词条，基本涵盖了常见科技类参考文献及英语词汇的翻译，是科学学习和研究的有利工具。