Lesson Notes By Weeks and Term - Junior Secondary 2

Angles I

Get it on Google Play
Get it on the Apple App Store
  1. Home
  2. Lesson Notes By Weeks and Term
  3. Junior Secondary 2
  4. Angles I

TERM – 1ST TERM

WEEK SIX

Class: Junior Secondary School 2

Age: 13 years

Duration: 40 minutes of 5 periods each

Date:

Subject: BASIC TECHNOLOGY

Topic:  ANGLES I

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

  1. Define an angle
  2. Identify and describe the types of angles
  3. State the uses of angles                                  

INSTRUCTIONAL TECHNIQUES: Identification, explanation, questions and answers,

demonstration, videos from source

INSTRUCTIONAL MATERIALS:   Videos, loud speaker, textbook, pictures, mathematical sets, drawing instruments.

INSTRUCTIONAL PROCEDURES

PERIOD 1-2

PRESENTATION

TEACHER’S ACTIVITY

STUDENT’S

ACTIVITY

STEP 1

INTRODUCTION

The teacher explains the meaning of angles

Students pay

attention

STEP 2

EXPLANATION

Teacher state and discuss the types of angles

Students pay

attention and

participate

STEP 3

DEMONSTRATION

Teacher discusses uses of angles.

Students pay

attention and

participate

STEP 4

NOTE TAKING

The teacher writes a summarized

note on the board

The students

copy the note in

their books

 

NOTE

ANGLES I

An angle is a measure of the amount of turn or rotation between two lines or surfaces that meet at a point.

Angles are measured in degrees with 360° forming a full circle. There are three main parts of an angle:

- The vertex is the point where the two lines or surfaces meet.

- The arms are the lines or surfaces.

- The angle is the space between the arms at the vertex.

 Types of angles

There are several types of angles, including:

1. Acute Angle: Measures between 0 and 90 degrees.

2. Right Angle: Exactly 90 degrees.

3. Obtuse Angle: Measures between 90 and 180 degrees.

4. Straight Angle: Exactly 180 degrees.

5. Reflex Angle: Measures between 180 and 360 degrees.

6. Complementary Angles: Add up to 90 degrees.

7. Supplementary Angles: Add up to 180 degrees.

 

Uses of angles

Angles have various applications in different fields:

  1. Geometry: Essential for understanding shapes, sizes, and properties of geometric figures.
  2. Trigonometry: Fundamental in trigonometric functions for analyzing relationships between angles and sides in triangles.
  3. Physics: Used in mechanics, optics, and other branches to describe rotational and directional aspects.
  4. Engineering: Critical for designing structures, circuits, and mechanical components.
  5. Navigation: Crucial for determining directions, bearings, and distances in navigation systems.
  6. Surveying: Vital for measuring and mapping land, determining elevations, and angles between points.
  7. Architecture: Used in designing buildings and ensuring structural stability.
  8. Astronomy: Utilized to measure positions and distances of celestial objects.

EVALUATION: 1. What is an angle?

  1. Identify and describe 5 types of angles
  2. Mention 5 uses of angles.

CLASSWORK: As in evaluation

CONCLUSION: The teacher commends the students positively