Question

Why is first angle projection preferred over third angle projection in most of the countries?​

Answer 1

Answer:

why we are not use bottom view for describe standard projection method. ... First Angle and Third Angle Projection. So, just for the simplicity of drawing the orthographic views, we prefer first angle projection. In other words, Orthographic projection is a way of drawing a 3D object from different directions.

Answer 2

Answer:

1) In First angle method Object is assumed to be placed in First quadrant whereas in third angle method of projection, Object is assumed to be placed in third quadrant.

2) In First angle method Object lies between the projection screen and observer whereas in third angle method of projection, projection screen lies between the object and observer.

3) As a result, In First angle method, View from left is projected on right side and view from right is projected on left side.In third angle method, View from left is projected on left side and view from right is projected on right side.

Explanation:

Hope this helps you :-)