Lesson Notes By Weeks and Term - Senior Secondary 1

Circle

TERM – 1ST TERM

WEEK SEVEN

Class: Senior Secondary School 1

Age: 15 years

Duration: 40 minutes of 5 periods each

Date:

Subject: Technical Drawing

Topic: CIRCLE

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

I.) Define circle

II.) Identify and describe the parts of a circle.

III.) Discuss the types of a circle.

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 draw a circle and discusses all the parts. Students listens attentively to the teacher STEP 2 EXPLANATION Teacher identify and discusses the types of circles. 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

CIRCLE

A circle is a two-dimensional geometric shape consisting of all points in a plane that are equidistant from a fixed point called the center. It is defined by its center and radius, and it is characterized by its circumference, which is the distance around the circle. In simpler terms, it's a perfectly round shape.

Parts of a circle

1. Center: The point inside the circle from which all points on the circle are equidistant.
2. Radius: The distance from the center of the circle to any point on its circumference.
3. Diameter: The distance across the circle through its center, equal to twice the radius.
4. Circumference: The distance around the circle.
5. Arc: A portion of the circumference.
6. Sector: The region enclosed by two radii of the circle and the arc between them.
7. Chord: A straight line segment whose endpoints both lie on the circle.

Types of circles

1. Unit Circle: A circle with a radius of 1.
2. Congruent Circles: Circles with the same radius.
3. Concentric Circles: Circles that share the same center but have different radii.
4. Tangent Circles: Circles that intersect at exactly one point.
5. Intersecting Circles: Circles that share two or more points.
6. Secant Circles: Circles that intersect at two points.

EVALUATION: 1. Using  a pair of compass, draw out a circle and label all the parts

CLASSWORK: As in evaluation

CONCLUSION: The teacher commends the students positively