Geometric projections are methods used to represent three-dimensional objects on a two-dimensional surface, such as paper or a computer screen. These techniques help visualize complex shapes and structures by simplifying their dimensions and angles. Common types of geometric projections include orthographic projection, isometric projection, and perspective projection, each serving different purposes in fields like engineering, architecture, and graphic design. In orthographic projection, multiple views of an object are displayed without perspective, showing the true dimensions. Isometric projection allows for a 3D representation where the angles between axes are equal, making it easier to understand the object's form. Perspective projection mimics human vision, creating a sense of depth by converging lines toward a vanishing point.