because in 2nd and 4th angle,both the view is going to overlap with each other,so we cant able to visualise the drawing properly,so we are not drawing in 2nd and 4th angle. kash answer
kash_115@Yahoo.com
the angkle of projection is an angle and the projection
The range of projectile is maximum when the angle of projection is 45 Degrees.
A cone shown in a circle
they are fools
120
you do not use it when you multiply
any country using in second r fourth angle projection r else what r the advantages between first angle and third angle projetion
the angkle of projection is an angle and the projection
Because in second angle both quaderent comes negative that's why we cant use second angle method
first angle projection and third angle projection.
its always in front of d vertical plane..however there are 4 methods of projection 1st angle second angle 3rd angle and fourth angle..but 1st and 3rd are preffered as the views come distinct in second and forth the views are placed one over the other causing trouble in identifying d views
Neglecting term "opposite".. In third angle projection, what we see are what are we going to draw
because 2nd and 4th angle projection overlap each other
Method of Projections tell us the positions of the views where they are projecting on the Planes. Consider 1st Angle of projection, All the views from a particular direction are projected on the opposite side, while in 3rd Angle of projection, All the views from a particular direction are projected on the same side. Take a case of 2nd Angle of Projections( means object lies in 2nd Quadrant) since the image is to be formed on the planes only that is why we have to keep right side view on the same side from viewing while top view on the opposite side from viewing. This contradicts view placement( i.e. once you are placing on same side and once on Opposite). Same is applicable in 4th Angle of Projection also.
Third angle projection is in common use in the USA, Canada, and the UK. The rest of the world more commonly uses first angle. There is no inherent superiority of one projection over the other. When you are making drawings that may be used internationally, it's a very good idea to indicate by a small symbolic diagram which projection is in use. This diagram is usually a side and end view of a truncated cone.
In 1st angle projection the front view will be in the top of the xy plane and the top view will be in the bottom of the xy plane .In 3rd angle projection the top view will be in the top of the xy plane and front view will be in bottom of the xy plane. dis will give a clear view.i hope u know dis... but in 2 angle projection both the views(front and top) will be in the top of the xy plane and in 4th angle projection both the views (front and top) will be in the bottom of the xy plane... since both the views will be in one side of the xy plane, its not possible to draw... both views will merge... to get more clear view, refer any basic engineering drawing book.......
In a first angle projection, the object stands in between the observer and the plane of projection. In a third angle project, the object and the plane of projection is interchanged.