How do i imagine right side view in CAD when i have only the top and front view to go off of?

Answer 1

I've mande a sketch of how I learned to do it (in school during the 80s):

http://img300.imageshack.us/img300/2687/projectsideviewxk3.png

In the image, black lines are visible lines, grey are hidden (normally dashed/dotted in drawings?), red are projection helper lines and blue are the result. The image shows a pyramid with a rectangular hole through it.

The red lines from the top to the side give you the depth information, the ones from the front, "mirrored" on the 45° slope, give you the height information. This only works when you have hidden lines, though - without them you cannot reconstruct the missing view.

To change this scenario to recreate the right side view, simply "mirror" this setup - put the 45° slope on the other hand side of the front view.