What projection method is used to represent three-dimensional objects in two dimensions?

Orthographic projection is a technique used to represent three-dimensional objects in two dimensions effectively. This method employs a parallel projection where the projection lines are perpendicular to the projection plane, allowing for accurate depictions of the object's dimensions without distortion. In orthographic projection, multiple views (such as top, front, and side) are typically presented, which helps convey the object's true shape and size unambiguously.

This approach is particularly useful in engineering and architectural drawings, where precise measurements and clarity are paramount. Unlike some other methods, orthographic projection does not alter the dimensions of the object, meaning that lengths and angles remain proportional and true to the original object, which is crucial for technical and design specifications.