What is first angle projection and third angle projection

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First angle projection and third angle projection are two methods used in engineering drawings to represent a 3D object in 2D.

First angle projection is commonly used in Europe and Asia, while third angle projection is commonly used in North America.
In first angle projection, the object is placed in the first quadrant and the views are projected onto the planes of projection.
In third angle projection, the object is placed in the third quadrant and the views are projected away from the planes of projection.
First angle projection is represented by placing the views below the object, while third angle projection is represented by placing the views above the object.
Both methods follow specific conventions for representing different views of the object, such as top, front, and side views.

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