# Lesson Notes By Weeks and Term - Senior Secondary 1

Oblique drawing 1

TERM – 3RD TERM

WEEK NINE

Class: Senior Secondary School 1

Age: 15 years

Duration: 40 minutes of 5 periods each

Date:

Subject: Technical Drawing

Topic: OBLIQUE DRAWING 1

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

I.) Define oblique Projection

II.) Describe oblique axes and angles.

III.) Identify the types of oblique 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 introduces oblique drawing and describe how they are drawn. Students listens attentively to the teacher STEP 2 EXPLANATION Teacher Identify oblique axis and angles. Teacher discusses the types of oblique Projection. Students exhibit attentiveness and active engagement STEP 3 NOTE TAKING The teacher writes a summarized note on the board The students copy the note in their books

NOTE

OBLIQUE DRAWING 1

Oblique projection is a method of representing three-dimensional objects in two dimensions. In this technique, the object is displayed with one face parallel to the viewer while the other faces are at an angle, giving a sense of depth. It's commonly used in technical drawings and architectural illustrations.

Oblique axes and angle

There are different angles that are used for representing objects in oblique format, however, we will be more focusing on angle 45⁰. The 45⁰. is placed between a slant line and a horizontal line, not two slant lines and a horizontal line. Other angles such as 30⁰ and 60⁰ that can be used also in advanced cases.

Types of oblique drawing

There are two types of Oblique Projection; Cavalier and Cabinet.

1. In Cavalier Oblique the receding lines are generally drawn full length using a 30° set square.

2. In Cabinet Obliques, receding depths are drawn half length at 45° or 60°.

EVALUATION: 1. What is the difference between cabinet and cavalier Projection?

CLASSWORK: As in evaluation

CONCLUSION: The teacher commends the students positively