BS25104 Geometrical Drawing I – Semester I – BDes – R-2025

Subject Code & Name: BS25104 – Geometrical Drawing I

Regulation: R-2025

Semester: I (First Semester)

Branch: B. Des. (BDes)

Credits / L-T-P: 3 Credits | L-T-P: 1-0-4

Course Objectives

• To develop an understanding of Geometrical Drawing.
• To master drawing the Geometric Shapes and Surfaces.
• To enable students to construct physical planar models of geometric shapes and surfaces.
• To familiarize students with the terminology and methods of orthographic, isometric, axonometric, and perspective projections.

Full Unit-wise Syllabus

Unit I – Introduction to Drawing

Introduction and setting to the drawing equipment, Concept of line, its types, Line thickness quality, grade, divisions and angles, polygons, circles, geometrical curves, helix etc. Concept of Dimensioning & dimension line. Freehand and Architectural lettering, proportion of letter size as per scale and size of the sheet. Scales – Types of scales: Plain scale and Diagonal scale. Introduction to point, line, plane. Definition of geometrical drawing.

Drawing lines and angles. Drawing shapes/planar surfaces – triangle, square, rhombus, rectangle, polygon, hexagon, etc. Drawing of circles, tangents, curves, and conic sections (hyperbola, parabola, ellipse).

Unit II – Geometrical Construction

Solids – cube, cuboids, cylinders, prisms, pyramids, spheres, cones – Sections of solids – The true shape of solids – Plan, elevation, and section of simple solids.

Unit III – Introduction to Axonometric Projections

Isometric and Axonometric projection of planes, solids and combinations of solids etc. Isometric and Axonometric projection of simple objects. Study of concepts, types and terminologies such as picture plane, station point, vanishing point, eye level, ground level, Horizon etc.

Unit IV – Measured Drawing

Introduction to fundamentals of measured drawing, line value, lettering, drawing representation, format for presentation methods and technique of measuring buildings and their details. Measured drawings of simple objects like furniture, detailing in terms of construction, ornamentation, measured drawings of building components like columns, doors, windows, cornices, etc.

Course Outcomes (COs)

• CO1: Basic understanding of geometrical drawing and the ability to recognize shapes and projections.
• CO2: Knowledge of geometric constructions, scales, and drawing techniques.
• CO3: Familiarity with projection methods and the ability to design simple measured drawings.
• CO4: Develop the ability to construct and visualize geometric forms through orthographic, isometric, and perspective drawings.

Assessment Pattern (Quick Note)

• Weightage: Continuous Internal Assessment 50% | End Semester Examinations 50%
• Internal methodology: Three Assessments with equal weightage – Internal written Test/Examination (approx. 33.33%), other two Assignments (approx. 33.33% each) incorporate continuous marking of the work and performance during the particular assessment period such as drawings, models, study, seminar, etc.

Source: Official Anna University – B. Des. R-2025 Syllabus
Last Updated: September 2026