Republic of the PhilippinesLAGUNA STATE POLYTECHNIC UNIVERSITY

Siniloan, LagunaSiniloan (Host) Campus

Submitted by:

Jennilyn F. Balbalosa

Submitted to:Mrs. Aimee Chavez

I. Objectives1. Name the terms related to the circle.2. Give the definitions of the terms-related to the circle.3. Show the terms related to the circle.

II. Subject MatterTopic: Naming the Terms Related to the Circle.Reference: Geometry Textbook for Third Year High School Materials: pictures, cartolina, plastic coverValues Focus: Cooperation

Teacher’s Activity Student’s ActivityA. Preparatory Activities

1. PrayerStand up everybody let us pray.

_______please lead the prayer.

2. Greetings

Good morning class!

Please be seated.

3. Checking of Attendance

Is there any absent today?

Very good!

4. DrillClass let us identify the following images.

In the name of the father…..Amen

Good morning, ma’am.

Thank you.

None ma’am!

__________give the names of the given images.

Very good!

5. ReviewClass before we proceed to our lesson, let me see if you can still recall our past lesson.

What are the secondary parts of the triangle?Yes, _________.

Excellent! Give him/her a boom clap!

Now, who can define the altitude?Yes, __________.

Very good! Altitude is the height of a triangle.

How about the angle bisector?Yes, ____________.

Ma’am the given images are clock, wheel, button, and a one-peso coin.

The students will raise their hands.

Ma’am, the secondary parts of the triangle are the altitude, angle bisector and the median.

Ma’am, altitude is the height of a triangle.

Ma’am, angle bisector divides any angle of

Very good! The angle bisector divides any angle of a triangle of equal measures.And the last, what is median?Yes,___________.

Excellent! Median is drawn from any vertex of a triangle to the midpoint of the opposite side.

6. Motivation

Class I need four volunteers here in front.

(The teacher calls four students)Now, each of you will choose a picture.

Okay, open the picture.After opening, what you are going to do is to construct the rumbled images. Are you ready?

Okay, you may start constructing.

Okay, what image did you construct?

Excellent! Give them a boom clap!Now, class what do you observe on the four images? Yes, _________.

Very good! The images here are all circle.

B. Developmental Activities

1. Presentation of the lesson and discussion.(The teacher presents the topic of the lesson)

Class, before we go on in our topic, let us define the circle._______do you have any idea what is circle?

a triangle of equal measures.

Ma’am, median is drawn from any vertex of a triangle to the midpoint of the opposite side.

The students will raise their hands.

The students will choose a picture.

Yes, ma’am!

The students will construct the rumbled images.

Each of the four volunteer students will label the images that they construct.

Ma’am they are all circle.

NAMING THE TERMS RELATED TO THE CIRCLE

Yes, very good. Circle is a closed curve; all points of which are equidistant from a fixed point is called the center.(The teacher will point out the center of a circle that she presented).

Class, the circle here is called circle O.

(The teacher will present the lines related to the circle).

Class, these are the lines related to the circle. Please read number 1. Yes, ________.

Thank you, ________.(The teacher will point out and explain the radius). Next number two, please read. Yes,________.

Thank you,_________.AB is a chord on this circle.Next number three, please read ___________.

Yes, MN here is a diameter of this circle. It is twice the length of a radius.Next, ___________.

Line JT is a secant. And the last number please read ____________.

Thank you again, this point is called the point of tangency. Line XY is tangent to circle O at E.

Now class, what can you concludes from the

Ma’am, circle is a closed curve.

A radius is a segment one of whose endpoint is in the center of the circle and the other endpoint is any point on the circle.

A chord is a segment whose endpoints are any two points on the circle.

A diameter is a chord which passes through the center of a circle.

A secant is a line that contains a chord.

A tangent is a line in the plane of a circle that intersects the circle at exactly one point.

definitions of lines related to the circle?Yes, __________.

Excellent! All radii of a circle are equal in measure.Another? Yes, ________.

Excellent! Both of your answers are correct.

Now let’s proceed to other basic terms needed in the study of the circle.(The teacher will show the illustration and definitions of other basic terms of the circle).

2. Guided PracticeClass identify each of the following related to the circle.

1. ST 2. O3. SN4. OM5. PR6. SN7. PNR8. <MON9. TSM10. SMP

3. Generalization(The teacher will call ten students to answer on the board)

Very good! All of your answers are correct.(The teacher will point out each of the given terms related to the circle).

Ma’am all radii of a circle are equal in measure.

Ma’am all diameters of a circle are equal in measure.

M

N

RO

Q

T P

C. Application

Class let me see if you are already familiar in naming terms related to the circle.(The teacher will show another circle).What is the name of a circle?Yes,__________

Very Good! This circle is circle P.Next what are the two radii?

Very good! AP and PO are the radii here.

Another, what are the names of two diameters here? Yes, ________.

Excellent! The two diameters here are OM and AR.

Give the names of two points of tangency __________.

Very good! Is there any question about our lesson?

III. EVALUATIONDraw your own circle and illustrate the following:

1. chord QR2. center A3. diameter DE4. radius AC5. central angle PAC6. minor arc BD7. radius AP8. major arc BDS9. semi circle DBE10. tangent OB

Okay, class are you through?

Pass your paper forward.

IV. ASSIGNMENT

Ma’am circle P.

Ma’am AP and PO.

Ma’am OM and AR.

Ma’am lines SN and TM.

None, Ma’am!

For your assignment, please read and study about space figures.

That’s all for today!Goodbye class!

Yes, Ma’am!

Goodbye, Ma’am!