Semi-Detailed Lesson Plan in Mathematics (Grade 9)
I.
OBJECTIVES
At the end of 1the lesson, the students in the class will be able to:
1. Identify the properties of parallelogram;
2. Apply the parallelogram in problem solving;
3. Proves theorems on the different kinds of parallelogram (rectangle, rhombus,
square).
II. SUBJECT MATTER
A. Topic: Proves theorems on the different kinds of parallelogram (Rectangle,
Rhombus, Square)
B. Reference: Mathematics Quarter 3, Wk.2- Module 2 Properties of Parallelogram p.4-10
C. Teaching Materials: Powerpoint presentation, video lesson
III. PROCEDURES
A. Preliminary Activities
a) Prayer -the teacher will ask a volunteer to lead for a prayer.
b) Greeting the class - the teacher will greet the class
c) Checking the attendance - the teacher will calling each names of students.
B. Review
a. What was our topic yesterday?
C. Motivation
Google meet feature Share Screen, the teacher will introduce the game “Thumbs
up and down emoji” while answering the given questions.
CORRECT
WRONG
D. Lesson Proper
Today we are going to proves theorems on the different kinds of parallelogram
(Rectangle, Rhombus, and Square).
E. Discussion
Teacher will introduce the theorems and showing the pupils how to prove
theorems on different kinds of parallelograms. Aside from that, teacher also
will show the pupils a video lesson, let them analyze the content of the video
and the teacher will ask some questions regarding from the video they watch.
Also teacher will let students to prove some problem based on their
understanding about the lesson.
F. Application
The students will answer the exercises prepared and to be submitted through
gmail account.
Direction: Answer the following on your notebook. The take a picture of it and pass
your work to my gmail account. meryjanepanchacala@gmail.com
Exercise 1.
Given: ◻ROSE is a rhombus
Prove: RS ⊥ OE
Proof:
Statements
1.
2. OS ≅ RO
3.
Reasons
1. Given
2.
3. The diagonals of a parallelogram bisect
each other.
4.
4. H is the midpoint of RS.
5. Definition of midpoint.
5.
6.
6. OH ≅ OH
7. SSS Postulate
7.
8.
8. ∠RHO ≅ ∠SHO
9. ∠RHO and ∠SHO are right 9.
10. Perpendicular lines meet to form right
angles
angles.
10.
Exercise 2.
Given: ◻VWXY is a rhombus
Prove: ∠1 ≅ ∠2
∠3 ≅ ∠4
Proof:
Statements
1.
2. ∠YV ≅ ∠VW ; ∠WX ≅ ∠XY
3.
4. ΔYVW ≅ ΔWXY
5. ∠1 ≅ ∠2 ; ∠3 ≅ ∠4
Reasons
1. Given
2.
3. Reflexive Property
4.
5.
G. Generalization
Another exercise will be held to conclude today's session. The teacher will
group her students into two groups and will give a different scramble words, the
pupils need to arrange it accordingly to the correct words and put some definition.
The teacher will give atleast 3 minutes to solve it.
First word- samgrlolelapar
Second word- subhomr
H. Evaluation
For your assignment
Direction: Answer the following items prepared. You need to pass it next
session.
1.) Given: ◻CORE is a rhombus
a. Is CL = RL? Is EL = OL?
b. Which triangles in ◻CORE are congruent?
Why are they congruent?
2. Given: ◻HINT is a rhombus
What are the characteristics of ◻HINT?
Prepared by:
Mery Jane J. Panchacala
Mathematics Pre-Service Teacher
Checked by:
______________________
Cooperating Teacher