Three Dimensional Geometry ch 12 maths class 11 is a field of Mathematics that focuses on the analysis of points, lines, and solid shapes in three-dimensional coordinate systems. I ntroduction to 3d geometry class 11 introduces students to the concept of the z-coordinate in addition to the x and y coordinates, which is used to determine the precise location of a point in the 3D coordinate plane. It is a fundamental theory with broad applications in other scientific disciplines and advanced Mathematics. Additionally, the trigonometric ratios concept has important applications in 3D Geometry.