NCERT Solutions Class 11 Engineering Graphics Chapter 5 PDF

Class 11 Engineering Graphics Chapter 5 Orthographic Projection of Regular Plane Figures NCERT Solutions help students solve the six 2026-27 assignment questions on pentagonal, triangular, square, hexagonal, rectangular and circular laminae. Each answer follows drawing-sheet order: true-shape view, line view, tilt and final projection.

• Includes 6 solved construction answers from the NCERT assignment.
• Covers planes parallel to H.P., parallel to V.P., inclined to H.P. and inclined to V.P.
• Most students improve accuracy by choosing the true-shape view first.

What is Covered in Class 11 Engineering Graphics Chapter 5 NCERT Solutions?

The chapter explains projections of regular plane figures in common positions. It uses laminae such as triangles, squares, pentagons, hexagons, rectangles and circles.

Plane Figure Projection Workflow for Chapter 5

Use the same workflow for most questions. Start with the view where the lamina shows true shape. Then project the line view, tilt that line to the required angle and project the final view.

1. Draw the XY reference line first.
2. Choose the true-shape view from the given plane position.
3. Project the line view on the other plane.
4. Tilt only the line view when an angle is given.
5. Transfer distances carefully to complete the final view.

HP and VP View Selection in Orthographic Projection

The biggest mistake in this chapter is tilting the wrong view. If the plane is inclined to H.P., tilt the front view line. If the plane is inclined to V.P., tilt the top view line.

• Height above H.P. is marked in front view.
• Distance from V.P. is marked in top view.
• A resting side on H.P. stays on XY in front view.

Projection of Planes Video for Engineering Graphics

Source: S Chand Academy on YouTube

How to Use the Chapter 5 Solutions PDF

Keep a drawing sheet beside the PDF. Read the quick solution first, then copy the numbered construction steps. After each question, check the view that shows true shape and the view that becomes a line.

• Use light construction lines before darkening final edges.
• Label matching points in both views.
• Measure distances from XY, not from the page border.
• Use enough points when projecting a circle.

Questions and Expert Solutions for Regular Plane Figures

The question-card file gives every answer in collapsible tabs. Use it after you try the drawing yourself.

Also Check NCERT Resources for Chapter 5

Class 11 Engineering Graphics NCERT Solutions Chapter-Wise