Subject Code & Name: AR25103 – Geometrical Drawing
Regulation: R-2025
Semester: I (First Semester)
Branch: B. Arch. (Arch)
Credits / L-T-P: 4 Credits | L-T-P: 1-0-3
Course Objectives
- To introduce geometrical understanding as one of the bases of architecture.
- To give an understanding of basic and derived geometry of form in terms of their generation and attributes.
- To give skills of representation of forms in terms of technical drawing and projections.
Full Unit-wise Syllabus
Unit I – Geometry, Planar Forms and Projection Concepts
Relation between geometry and form. Introduction to point, line, plane, solid. Definition of geometrical drawing. Drawing lines and angles. Drawing shapes/planar surfaces triangle, square, rhombus, rectangle, polygon, hexagon, etc. Drawing of circles, tangents, curves, conic sections (hyperbola, parabola, ellipse). Construction of physical planar models of all the above. Viewing the physical planar models from different angles and sketching them with light and shade, shadow as a prelude to understanding the concepts of different types of projections and sciography. Introduction and explanation of terminologies – orthographic, isometric, axonometric, perspective projections and sciography.
Unit II – Projections of Lines, Planes and Perspectives
Drawing problems on orthographic, isometric and axonometric projections of lines and planes of different types in different positions. Sciography for the same. Types of perspective projections – one point, two point, three point. Terminologies – picture plane, stationary point, vanishing point, cone of vision, eye level, etc. Methods of constructing perspectives. Drawing perspective projections of simple planar surfaces/shapes. Sciography for the same.
Unit III – Geometric Solids and their Projections
Introduction to geometric solids – cube, prism, pyramids, cones, cylinders. Generation of geometric solids through construction of physical models from lines and planar surfaces (including concept of development). Construction of block models of solids. Viewing the models from different angles and sketching them with light and shade, shadow in order to understand them in different types of projections. Drawing problems on orthographic, isometric and axonometric projection of solids of different types in different positions. Sciography for the same. Perspective projection of simple solids. Sciography for the same.
Unit IV – Sections, Intersections and Composite Forms
Understanding sections of solid and true shape of sections through cutting of block models, viewing them from different angles and sketching them. Understanding simple intersection of solids and composite forms through making block models and viewing them from different angles and sketching them. Simple drawing problems on orthographic, isometric and axonometric projection of the above.
Course Outcomes (COs)
- CO1: Ability to understand the relationship between geometry and architectural form.
- CO2: Understanding of various attributes of geometric forms and skill in their creation and dissection.
- CO3: Ability to represent geometric forms through technical drawings.
Assessment Pattern (Quick Note)
- Weightage: Continuous Internal Assessment 50% | End Semester Examinations 50%
- End Semester examination duration: 4 hours
- Internal methodology: Three Assessments with equal weightage – Internal written Test/Examination (33.33%), other two assessments (each 33.33%) as continuous marking of the work and performance during the particular assessment period such as drawings, models, study, seminar, etc.
Source: Official Anna University – B. Arch. R-2025 Syllabus
Last Updated: September 2026
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