Orthographic projection is a technique for representing 3D objects using views from various angles, typically front, side, and top. The process involves drawing perpendicular lines and projection lines, followed by detailing the views. It includes methods for both first and third angle projections.

1. Orthographic Projection

2. Orthographic Projection is a
way of drawing an 3D object
from different directions
Usually a front, side and
plan view are drawn

5. First angle projection
First angle projecting

6. First angle unfolding

7. First angle projection

9. Third angle projection
Third angle projecting

10. Third angle projection

12. Steps
 Draw line perpendicular to each other.

13. Contd…
 Draw projection lines of the edges.

14. Contd….
 Draw front, top and side views.

15. Contd…
 Dimension