Table of Contents

**Projection Method | First And Third Angle Projection | Difference**

__Projection Methods:__

Projection Methods are used to show drawing on a paper . Projection Methods has mainly two types used in Engineering Drawing :

*1) First Angle Projection Method*

*2) Third Angle Projection Method*

__First Angle Projection__

__First Angle Projection__

In this the object in assumed to be positioned in the first quadrant and is shown in figure.

The object is assumed to be positioned in between the projection planes and the observer. The views are obtained by projecting the images on the respective planes. Note that the right hand side view is projected on the plane placed at the left of the object. After projecting on to the respective planes, the bottom plane and left plane is unfolded on to the front view plane. i.e. the left plane is unfolded towards the left side to obtain the Right hand side view on the left side of the Front view and aligned with the Front view. The bottom plane is unfolded towards the bottom to obtain the Top view below the Front view and aligned with the Front View.

__Third Angle Projection__

__Third Angle Projection__

Difference between first- and third-angle projections

Difference between first- and third-angle projections

**Symbol of projection**

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