Beginner
Orthographic Projection
Showing a 3D object using flat 2D views.
STEP 1 · CONCEPT
Project the object onto planes at right angles to get front view, top view and side view.
STEP 2 · ANGLES
India (BIS) uses first-angle projection: top view is drawn below the front view.
STEP 3 · LINES
Visible edges are thick continuous; hidden edges are dashed; centre lines are chain lines.
WORKED EXAMPLE
For a cylinder standing upright, the front view is a rectangle and the top view is a circle.
Practice questions
Q1.In first-angle projection, the top view is placed…
Orthographic Projection · Easy
Q2.Hidden edges are shown with…
Orthographic Projection · Easy
Q3.Front view of a cone with axis vertical is a…
Orthographic Projection · Medium