the hidden line in a Third-angle projection, is near side of the object close to the adjacent view, but in first-angle projection the near side of the object is remote from the adjacent view. or the top and the side view.
Orthographic Projection has 3 different views that model off of the 3-D view which is is the top right corner of the paper, the other three views are top, side, and front. the top view is on the top left side and is the top of the object, the tide view is on the bottom left of the paper and shows the side of the object, amd the front view is on the bottom right of the paper and shows the front of the object.