Isometric projection differs from orthographic projection in its approach and purpose. While orthographic projection uses multiple views (front, top, and side) to represent different aspects of an object separately, isometric projection combines these views into a single drawing, showing multiple sides simultaneously. Isometric projection uses 120-degree angles between the principal axes, which equally foreshorten all dimensions, providing a more realistic and comprehensive view. In contrast, orthographic projection focuses on precise, flat representations without perspective, making it ideal for detailed technical documentation. Isometric projection is more visually intuitive, helping to better visualise the overall shape and structure of an object.