TERM – 2^ND TERM

WEEK ONE

Class: Senior Secondary School 2

Age: 16 years

Duration: 40 minutes of 5 periods each

Date:

Subject: Technical Drawing

Topic: REVISION - PICTORIAL DRAWING

SPECIFIC OBJECTIVES: At the end of the lesson, pupils should be able to

I.) Construct objects in other types of pictorial drawings such as oblique and perspective projection.

INSTRUCTIONAL TECHNIQUES: Identification, explanation, questions and answers, demonstration, videos from source

INSTRUCTIONAL MATERIALS: Videos, loud speaker, textbook, pictures,

INSTRUCTIONAL PROCEDURES

PERIOD 1-2

PRESENTATION

TEACHER’S ACTIVITY

STUDENT’S

ACTIVITY

STEP 1

INTRODUCTION

The teacher guide students to construct objects in oblique and perspective projection.

Students listens attentively to the teacher and participate actively .

STEP 2

NOTE TAKING

The teacher writes a summarized

note on the board

The students

copy the note in

their books

NOTE

REVISION PICTORIAL DRAWING

Pictorial drawings serve as indispensable tools in engineering, architecture, and design, providing a visual representation of three-dimensional objects on a two-dimensional surface. In this revision summary, we delve into the intricacies of pictorial drawings, exploring various types such as isometric, oblique, and perspective projections, along with their respective constructions.

Isometric Projection

Isometric projection, renowned for its equal foreshortening along all three axes, offers a balanced depiction of objects. Constructed using a 30-degree angle for all axes, it maintains accurate proportions while simplifying the representation of complex structures.

Oblique Projection

Oblique projection, characterized by its skewing of the object's true shape, offers a unique perspective by projecting one axis at its true length while foreshortening the other two. With the primary axis typically aligned perpendicular to the viewing plane, the secondary axes are inclined at an angle, often 45 degrees. Come types includes; cavalier and cabinet projection.

Perspective Projection

Perspective projection, renowned for its realism and depth perception, replicates how objects appear to the human eye in three-dimensional space. Employing vanishing points and converging lines, perspective drawings accurately convey spatial relationships, albeit with varying degrees of distortion. Common types include one-point, two-point, and three-point perspectives, each offering a unique vantage point and level of distortion. Artists and architects often utilize perspective projection to create immersive visualizations and lifelike renderings.

Construction Techniques:

The construction of pictorial drawings necessitates a fundamental understanding of geometric principles and projection methods. Isometric drawings employ a grid system with equilateral triangles to maintain accurate proportions, while oblique projections utilize inclined lines to convey depth. Perspective projections require the establishment of vanishing points and convergence lines to create realistic spatial relationships. Mastery of these construction techniques empowers artists, designers, and engineers to communicate complex ideas with clarity and precision.

EVALUATION: 1. Two views of a block are shown above. Complete its perspective view.(WAEC)

CLASSWORK: As in evaluation

CONCLUSION: The teacher commends the students positively

Lesson Notes By Weeks and Term - Senior Secondary 2