Here is the improved and edited detailed lesson plan with a subject matter SSS Congruence Postulate. I uploaded the old version and now I upload the edited one. you can always download this one..maybe it could help you.

1. Gov. Alfonso D. Tan College
Teacher Education Department
Maloro, Tangub City
Demonstrator : Elton John B. Embodo
Subject Matter : SSS (Side-Side-Side) Congruence Postulate
Cooperating School : Sta. Maria National High School
Critic Teacher : Mr. Roland B. Amora
Principal : Mrs. Efleda D. Enerio

2. I. Objectives: At the end of the lesson, students are expected to:
a. complete the congruent marks to illustrate that the
triangles are congruent through SSS Congruence
Theorem;
b. match the given sides of triangles to show that the
triangles are congruent through SSS Congruence
Postulate;
c. describe the importance of equality in the society.
II. Subject Matter: SSS (Side-Side-Side) Congruence Postulate
Reference: Mathematics Learner’s Module for Grade 8 page (357)
Skills: drawing, analyzing and solving
Values: unity and cooperation
III. Materials: ruler, pencil, bond paper and cardboard
IV. Procedure: 4A’s Method
Teacher’s Activity Students’ Activity
A. Preparation
a. Review
(prayer)
(greetings)
(announcing of classroom rules)
(checking of attendance)
(collecting of assignment)
Before we proceed to our new lesson for today,
let’s have first a review about our lesson last
meeting
What did we discuss last meeting?
Yes Joyce!
Very good!
Who can recall what ASA Congruence
Postulate is?
Yesterday, we discussed about ASA
Congruence Postulate.

3. Teacher’s Activity Students’ Activity
Yes Evan!
Absolutely!
Who wants to go to the board and illustrate the
ASA Congruence Postulate?
Yes Rodan!
Very good!
The ABC and XYZ are congruent since
,A X   AC XZ and C Z   and it
refers to ASA Congruence Postulate.
a. Motivation
Now class, I have here two triangles made
from cardboard material. One is colored blue
and the other one is colored yellow.
Class, do you know on how to determine the
congruence of these two triangles colored blue
and colored yellow by dealing only on their
sides not the angles?
ASA Congruence Postulate states that, “If the
two angles and the included side of one
triangle are congruent to the corresponding two
angles and the included side of another
triangle, then the triangles are congruent.
(student does as told)
No, Sir!
A
B
C
X
Y Z

4. Teacher’s Activity Students’ Activity
B. Activity
So be with me this morning as I’ll discuss to
you the “SSS Congruence Postulate.”
Everybody read!
a. Statement of the Aim
*complete the congruent marks to illustrate
that the triangles are congruent through SSS
Congruence Postulate;
*match the given sides of triangles to show
that the triangles are congruent through SSS
Congruence Postulate;
* describe the importance of equality in the
society.
Now, I’ll group you into 4 groups and form a
circle with your group. All you have to do
class is to draw the desired figure through the
following procedures being flashed on the
screen.
Do you get me class?
When you are already finished, you have to say
with action, “Clap, clap, clap Champion”! The
group which can finish first will be the winner
and will receive a secret price.
I’ll give you five minutes to do it and your
time will start now.
“SSS Congruence Postulate”
Yes Sir.
Students do as told.

5. Teacher’s Activity Students’ Activity
C. Analysis
I want somebody from group 1 to draw their
figure on the board.
Yes Lovely
Is there somebody from group 2 to draw their
figure on the board?
Yes Apple
Is there any representative from group 3 to
discuss the work of group 1?
Yes Adrian
How about from group 4 to discuss the work of
the group 2.
Yes Rodan
Very good!
Let’s name the other triangle as OMN .
Do the following in your group:
(student does as told)
(student does as told)
(student does as told)
(student does as told)
1. Draw a straight horizontal
line segment and name it as
ST having a length of
15cm.
2. On the Point S of the line
segmentST , draw a
vertical line segment and
name it as SU having a
length of 20cm.
3. Connect the point U and T
to form a new diagonal line
segment named UT having
a measure of 25cm.
4. Name the newly formed
triangle as STU and
indicate the measures of the
three sides of STU .

6. Teacher’s Activity Students’ Activity
What side of STU corresponds with the side
MO of MNO ?
Yes Aaron
Very good!
Since, sides MO and SU are corresponding
sides, what then have you observed about their
measures?
Yes Cheyenne
That’s right
If they have the same measure, then how are
we going to describe them?
Yes Annie
That’s correct!
What side of STU corresponds with the side
MN of MNO ?
Yes Sunshine
Very good!
How are you going to describe the two
corresponding sides: MN and ST ?
Yes Panfy
Exactly!
So now, how are you going to describe the last
pair of sides; UT and NO ?
It is the side SU .
SU and MO have the same measure.
The two sides are congruent.
It is the side ST .
MN and ST are corresponding and congruent
sides because they have the same measure.
U
S
T
O
M N
20cm20cm
25cm
25cm
15cm 15cm

7. Teacher’s Activity Students’ Activity
Yes Ellajane
Absolutely!
D. Abstraction
Based from the information, can we now
determine that the STU and MNO are
congruent?
Then, why did you say “yes”?
Any idea?
Yes Evan!
Amazing!
Based from Evan’s answer, how are you going
to state the SSS (Side-Side-Side) Congruence
Postulate?
Yes, Lovely
Exactly!
Who else?
Yes Sunshine
Very good!
Now, how are you going to illustrate the SSS
Congruence Postulate? Who wants to volunteer
to go to the board and illustrate the SSS
Congruence Postulate?
UT and NO are corresponding sides and they
are also congruent because they have the same
measures, both of which is 25cm.
Yes Sir
We can now determine that the STU and
MNO are congruent because the three sides
of STU are corresponding and congruent to
the three sides of MNO .
SSS Congruence Postulate
If the three sides of a traingle are
conrresponding and congruent to the three
sides of the other triangle, th the two triangles
are congruent.
SSS Congruence Postulate
If the three sides of a traingle are congruent to
the three sides of another triangle, then they are
congruent.

8. Teacher’s Activity Students’ Activity
Yes Adrian
Very good!
For your better understanding, here is now the
exact statement of the SSS Congruence
Postulate.
Everybody read!
Values Integration
A while ago class, we’ve discussed about SSS
Congruence Postulate and we were able to
determine the Congruence of triangles through
this certain congruence Postulate.
Class, have you noticed the word congruence?
What word can you associate with the term,
congruence class?
That’s right!
Student does as told.
SSS (Side-Side-Side) Congruence Postulate
If the three sides of one triangle are congruent
to the corresponding three sides of another
triangle, then the triangles are conguent.
Example:
IfOT UN ,OS PN and ST UP then
OST PNU   .
Yes sir
It is similar with the word equality, sir.
T
S
O N
P
U

9. Teacher’s Activity Students’ Activity
So, class how important is equality in the
society?
Yes Janniah!
You have the idea!
Class, what if one family needs more remedy
from the government than the other families,
should the government give more remedy to
that certain family?
Why did you say yes?
Yes, Sunshine!
That’s right!
Let me show you this picture to you.
Your answers are related to this picture.
So it is not enough that every family receives
equal amount of remedy from the government
when one family needs more than the other do.
So, to make them more equal, the government
should give more remedy to the family which
needs more.
For me, equality is very important in order for
the people in the society to be equal. In terms
of benefits from the government, whenever a
family receives remedy from the governement,
the other families will also receive. In that way,
they will be equal.
Yes Sir
To make every family fair, the government
should give more remedy to certain family
which needs more help than the other families.

10. Teacher’s Activity
“Equality has become synonymous with
“levelling the playing field.” So let’s make
equity synonymous with “more for those who
need it.”
Do you get me class?
E. Application
How important are congruent triangles in real
world class? How are they being applied?
Yes Evan!
Amazing!
What a nice answer!
Activity 1
Directions: Complete the congruent marks of
the following pairs of triangles to
illustrate that they are congruent
through SSS Congruence
Postulate.
1.
2.
Students’ Activty
Yes Sir
Traingles are ver important since they are
useful in constructing geometric structures like
bridges, houses, hospitals, buildings and other
establishements that involve triagles. They
served as the basic foundation to make the
structures strong, balance and safe.

11. Teacher’s Activity
3.
4.
5.
Students’ Activity

12. 1. e
2. d
3. c
4. b
5. a
Teacher’s Activity Students’ Activity
V. Evaluation
Directions: Match the given sides in Column A
to their corresponding side in column B to
show that the following pairs of triangles are
congruent through SSS Congruence Postulate.
Column A Column B
1. ABC  8 ,AB cm 9 ,BC cm 12AC cm
DEF  8DE cm , ?,EF  12DF cm
.) 25 2a cm  
2. GHI  7 ,GH cm 6 ,HI cm ?GI 
JKL  7 ,KJ cm 6 ,KL cm 8JL cm
90
. 15
3
b cm
 
  
3. MNO  ?,MO  12NO cm , 14MN cm
PQR  10 ,PR cm 12 ,PQ cm 14QR cm
24
. 2
2
c cm
 
  
4. STU  18 ,SU cm 17 ,TU cm 15ST cm
VWX  18 ,VX cm 17 ,WX cm ?VW 
64
.
8
d cm
 
  
5. YZA  5 ,YZ cm ?,AY  9ZA cm
BCD  5 ,CD cm 7BC cm 9BD cm
VI. Assignment
Directions: In a one-half crosswise, prove that XAY
and FEG are congruent through SSS Congruence
Postulate. Give at least three statements with
corresponding reasons. Make it in a tabular form.
Pass it next meeting.
 . 2 10 11e cm  