Why we don't use second angle and fourth angle projection?

Answer 1

So in general, to create 2 dimensional figure we need X and Y co-ordinates. So in quadrant there are 4 region. so in first region the X and Y co-ordinates will be +ve, So in 2nd X -ve and Y +ve, so in 3 rd X and Y will be -ve, and in 4th region X +ve & Y -ve. So for this reason the 2nd and the 4th quadrant the object will merge. So it will leads to some kind of error.

So that's the reason we don't use 2nd and 4th angle projections.

Joseph. F. B