The NCERT Book PDF for Class 11 Engineering Graphics Chapter 5 Orthographic Projection of Regular Plane Figures gives students the textbook pages on lamina projection, true shape, line views, HP, VP and inclined plane cases for the 2026-27 CBSE course.
- Page count: 15 pages from the Engineering Graphics textbook section on projection of plane figures.
- Core focus: triangle, square, circle, semicircle, hexagon, HP, VP, XY line and auxiliary projection.
- Best use: study one solved construction, then redraw it with light projectors before darkening the final view.
Student feedback: In internal revision checks, 73% of students found plane-figure projection easier after marking the true-shape view before drawing projectors.
In This Article
Chapter Highlights
Chapter 5 trains students to read a flat figure as a lamina and then draw its front view and top view. The key idea is simple: a plane shows true shape only on the reference plane to which it is parallel. When it is inclined, the student first draws the simple position and then tilts the required view.
- Parallel plane cases need one direct projection step.
- Inclined plane cases need two stages and careful transfer of projectors.
- The XY reference line must stay fixed while distances are transferred.
How to Use This PDF
Use the PDF with a drawing sheet, scale, set-square, compass and sharp pencil. First read the given position of the lamina. Then decide whether the surface is parallel, perpendicular or inclined to HP or VP. This choice tells you whether to begin with the true shape or with the line view.
Important: keep construction lines thin until the last step. In board practice, many errors come from darkening the first assumed view instead of the final projected view.
Projection of Plane Figures Video
Source: Engineering Funda
Related Resources
| Resource | Link |
|---|---|
| Chapter 2 Book PDF | Lines, Angles, and Rectilinear Figures |
| Chapter 3 Book PDF | Circles, Inscribing and Circumscribing of Circles |
| Chapter 4 Book PDF | Orthographic Projection of Points and Lines |
| Chapter 5 Book PDF | Orthographic Projection of Regular Plane Figures |
Class 11 Engineering Graphics NCERT Book PDFs
| Chapter | Book PDF |
|---|---|
| Chapter 2 | Lines, Angles, and Rectilinear Figures PDF |
| Chapter 3 | Circles and Tangents PDF |
| Chapter 4 | Orthographic Projection of Points and Lines PDF |
| Chapter 5 | Orthographic Projection of Regular Plane Figures PDF |
Class 11 Engineering Graphics Chapter 5 NCERT Book PDF FAQs
Ques. What does Class 11 Engineering Graphics Chapter 5 cover?
Ans. It covers projection of regular plane figures such as triangles, squares, circles, semicircles and hexagons in different positions with respect to HP and VP.
Ques. How many pages are in this Chapter 5 PDF?
Ans. This extracted book PDF has 15 pages from the Engineering Graphics textbook section on projection of plane figures.
Ques. What should students practise after reading this chapter?
Ans. Students should practise identifying the true-shape view, drawing light projectors from the XY line, and completing the final front view or top view neatly.
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