DETAILED LESSON PLAN
ON MATHEMATICS 7
(April 03, 2023)
Topic: Basic Geometric Constructions
ISMAEL DE LEON ULEP
(Pre-Service Teacher)
JOHN BEE RIETA
(Cooperating Teacher)
MATH-7 LESSON PLAN on MATHEMATICS 7
Detailed Lesson
Plan
I. Objectives
A. Content Standard
School:
Aparri East National High School
Student-Teacher:
Ismael De Leon Ulep
Cooperating Teacher:
John Bee Mina Rieta
Teaching Time & Date:
April 03, 2023
B. Performance Standard
C. Learning Competencies
D. Learning Objectives
II. Subject Matter
Topic
Subtopic:
References
Other Learning
Resources/Materials
Skills:
III. Procedure
Grade Level:
7
Learning Area:
Mathematics
Cooperating Principal:
Bernadette Gorospe
Quarter:
Third
The learner demonstrates understanding of the key concepts
of geometry of shapes and sizes and geometric relationships.
The learner is able to create models of plane figures and
formulate and solve accurately authentic problems involving
sides and angles of polygon.
The learner uses a compass and straightedge to bisect line
segments and angles and construct perpendiculars and
parallels.
At the end of this module, learners are expected to:
1. perform basic constructions in geometry using compass
and straightedge; and
2. apply knowledge of basic construction to draw geometric
figures.
Basic Geometric Constructions
Drawing Geometric Figures Using Compass and
Straightedge
Mathematics - Grade 7 ADM Quarter 3-Module 4 Week 4
Laptop, compass, classroom screen, chalk, blackboard,
PowerPoint Presentation
Listening, Collaboration, Problem Solving, Critical and
Logical Thinking and Intellect
Teacher’s Activity
Students’ Activity
A. Preliminaries
a. Greetings
Good morning Class!
Welcome to our Mathematics class! I am Ismael Good morning, Sir.
De Leon Ulep and I am your teacher for today’s
discussion.
How’s your morning?
We are always fine, sir.
That’s great class.
b. Prayer
As we start, may I ask everyone to please
stand as we seek the guidance of the Lord to
enlighten our mind and to completely
understands today’s lesson.
Who is in charge for today’s prayer? Would
you please lead? Yes ____.
c. Classroom Management
Good morning once again. Okay, Before you
take your seats kindly pick up all the pieces of
trash. And arrange your chairs properly,
Is everything is okay now? Please be seated.
d. Checking of Attendance
Is there any absent today?
“It’s nice to know that most of you are present.
Now, as we go with our lesson, everybody,
kindly read some reminders posted on the TV.
We have some simple rules to follow.
Everybody read:
Understood?
e. Review
Before we proceed to our new lesson this
afternoon class, let’s have a review first of what
we have discussed last time.
Who can recall our topic last time?
(Student lead the prayer)
Yes Sir.
“None Sir
1.Listen to the teacher when he
speaks.
2.Ask for help when you need it.
3.Raise your hand before speaking
or leaving your seat.
4.do not make unnecessary noise
Yes, sir.
Angle Relationship Formed by a
Parallel Lines cut by a transversal.
Correct! So, what does it mean when we are
Transversal is a line that intersects
talking about transversal? Yes?_____
two lines in the same plane at two
different points.
Exactly!
In the figure formed there are five angle
relationship. What are those? Yes _______>
Corresponding angles, alternate
Interior angles, alternate Interior
angles
Very Good,
Same Side Interior angles and
Same Side Exterior angles
Do you have questions regarding our previous topic None Sir
class?
(if there are no questions raised)
Yes, sir
That shows that you really understood our previous
lesson.
Did you get it right? class
B. Motivation
Now, I believe you are all ready for a new lesson.
Am I right? But first let’s have a activity entitled “MY
DIVISION”. Count 1-6. Then move to your group
silently.
Yes sir
Direction: Please pay attention on the objects on the
board. After 1 minute of observation, please make a
line to dive equally the figure.
Times up! Please come in front, one representative
from each group. Then draw a line that divide them
equally.
Very Good! Give yourself a clap for job well done.
C. Presentation/Lesson proper
Now, based from our activity, what do you think is
our lesson for today?
Line, Divide
Our lesson is all about: Basic Construction of
Geometry
Let’s discuss first about the definitions of the following
terms in order for you to know well our topic for
today.
First, Let’s define what is a bisector. Kindly read the
definition of bisector?
Bisector is a line that divides
something into two equal parts.
From your activity it is called bisector. When we
divide an object with a line, the line called bisector.
Look at these figure:
Line MN is divided equally segment AB. What do you
call the segment AB?
Very Good.
Second is the perpendicular bisector. Kindly read.
Perpendicular Bisector means that it divides a line
Bisector
Perpendicular Bisector a line
perpendicular to another line that
divides the original line into two
congruent parts.
forming four right angles.
Look at these figure.
Line Segment AB is called the?
Third, what is a compass? Kindly read
This is a compass,
Compass is used for making circles right?
Can we use it to draw a angle, a line, or a segment?
We can use it. That’s why I told you to bring your own
compass.
But before we do that, what is Straightedge?
This pictures are example of straight edge.
Again Let’s Go back Basic Geometric Constructions
When we say basic geometry, what is it?
Correct, How about construction? Yes?
Salt
Corner of wall
And syringe
Perpendicular Bisector
A compass is an instrument for
drawing circles and arcs and
measuring
distances
between
points, consisting of two arms
linked by a movable joint, one arm
ending in a point and the other
usually carrying a pencil or pen.
Yes, sir.
No, Sir
Straightedge is a ruler (with or
without units) used to guide in
making a straight line or figure.
Points, Lines, Planes, Angles Sir.
Construction is all about making
and creating houses.
So, Basic Geometric construction is all about
constructing lines and angles using only a compass
and a straightedge.
The first that we are going to construct segment
How sir?
congruent to a given segment.
Again, congruent segment is?
Congruent segment means
A line has infinite length but no
width and thickness
Hose
Thread
Edge of a ruler
Slanted four sided figure
Flat surface
With length and width but no
thickness.
Bond paper
Tiles
Top of a table
E. Generalization
The teacher asks the following questions;
Based on what the students have learned,
1. What is a geometry?
Very Good!
2. Now, What is a point?
3.
4.
How do you name a point?
What is a line?
Very Good!
5. How do you name a line?
Yes Sir.
It is one of the oldest branch of
mathematics that concerned with
space, shapes, distance, size and
position of objects around us.
A point has no dimensions(
thickness, length , width ,height
and weight).represented by a DOT.
 A
A line has infinite length but no
width and thickness
AB
n
6.
What is a plane?
Slanted four sided figure. Flat
surface. With length and width but
no thickness.
Correct!
ABC
7. How do you name a plane?
Excellent! Let’s give ourselves a clap.
F. Application
Okay, it seems and I wish that you really
understand the undefined terms of . Are you ready to
face the challenge?
Yes Sir!
ACTIVITY: “CONSTRUCT ME”
I will group you into 6. In one whole sheet of bond
paper.
DIRECTION: In five minutes. On a separate sheet of
paper make an exact copy of ‘house’ figure given to
you. Use straightedge and compass in making it.
(Students will answer)
(Students will present their output)
Times Up. Please post your paper on the board.
Congratulations, Job well done
G. VALUING
You can divide your body by a bisector since our (Students will reflect)
body is symmetrical. I just want to leave this quote.
Divide your time equally to important things in order
to manage your life better.
H. ASSESSMENT
I. Answer the following. Choose the correct answer.
1. 1. Which tool is used in constructing bisector of an
angle?
Clinometer
Protractor
Ruler
Ruler
Weighing Scale
2. Which of the following terms refers as a line that
divides something into two equal parts?
Angle
Bisector
Bisector
Line Segment
Parallel
3. Which tool is used in marking an arc?
Clinometer
Protractor
Compass
Compass
Ruler
4. A line perpendicular to another line that divides the
original line into two congruent parts?
Perpendicular Bisector
Ray
Perpendicular Bisector
Angle Bisector
Line Segment
5. A line that divides an angle is called?
Perpendicular Bisector
Ray
Angle Bisector
Angle Bisector
Line Segment
I. ASSIGNMENT
Make a 5 list of examples of polygons. And that ends our discussion for today,
Thank you, keep safe ! and class dismissed!
Prepared by:
Ismael D. Ulep
Checked by:
Student-Teacher
John Bee M. Rieta
Cooperating Teacher