Geometry: It is a science which deals with solids, surfaces, lines and points. Solid: It is a limited portion of space i.e., space occupied by a body. Surface: It is the boundary of a solid. Line: It is the boundary of a surface. Point: It is the boundary of a limited line. Space: A space is the set of all the points in our world, that is a concept of entity. https://www.expertsmind.com/course-help/?p=lines-and-angles-98734287120