Angle of Projections

Positioning for 1st angle projections:

• In first angle projection, the object is imagined to be placed in the first quadrant, meaning the object is between the observer and the plane of projection.

• The planes of projection (typically the front, top, and side planes) are behind the object.

Views Arrangement:

• Front View: Directly projected onto the vertical plane (VP) behind the object.

• Top View: Projected downward onto the horizontal plane (HP), but in the drawing, it is placed below the front view.

• Side View: The left or right side view is projected onto the corresponding profile plane (PP) and placed on the opposite side of the front view. For example, the left side view is placed to the right of the front view.

View Placement:

• The top view is placed below the front view.

• The left side view is placed to the right of the front view.

• The right side view is placed to the left of the front view.

Positioning for 3rd angle projections:

Third angle projection is another method of orthographic projection used to create technical drawings of three-dimensional objects. In this method, the projection planes are placed between the observer and the object. The views of the object are projected onto these planes to create a 2D representation of the object from different angles.