1st angle 3rd angle drawing difference

Question

Accepted Answer

1st angle and 3rd angle drawings are two different methods of representing a 3D object on a 2D plane.

1st angle projection is commonly used in Europe and Asia, where the object is imagined to be in the first quadrant, while 3rd angle projection is commonly used in North America, where the object is imagined to be in the third quadrant.
In 1st angle projection, the top view is placed below the front view, while in 3rd angle projection, the top view is placed above the front view.
1st angle projection is more intuitive for some people as it mimics the way we naturally view objects, while 3rd angle projection can be easier for others to understand due to its similarity to reading a book.

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