Republic of the Philippines
Department of Education
Kapatagan National HS
Region XI
Lesson Plan in Mathematics (4 A’s)
Grade 7
Week 5 Lesson 2: 3rd Quarter
I. OBJECTIVES
At the end of 60-minute period with 80% proficiency level, the
students are expected to:
1. define, identify and illustrate different kinds of polygons
according to the number of sides;
2. differentiate convex from non – convex (concave)
polygons; and
3. identify the parts of a polygon.
II. SUBJECT MATTER
Topic: POLYGONS
References:
Geometry: Polygons: Different Kinds of
Polygons | SparkNotes. (n.d.).
Retrieved July 31, 2021, from
https://www.sparknotes.com/math/g
eometry1/polygons/section2/
Classifying Polygons. (n.d.). Retrieved
July 31, 2021, from
https://www.cliffsnotes.com/studyguides/geometry/polygons/classifyingpolygons
Instructional Materials: PowerPoint Presentation, Laptop,
Smart TV, Chalk, Eraser.
III. LEARNING PROCEDURE
A. Preliminary Activities
a.
b.
c.
d.
e.
Prayer!
Greetings!
Checking of the Attendance
Setting of Classroom Standards
Checking and collecting of assignments (if there’s any
B. Review
C. Motivation
D. Activity
E. Analysis
Ask the students about the previous lesson.
What they learn in previous lesson.
The teacher gives the game entitled “Guess the Word” related
to the topic.
IDENTFY ME: Whether Equilateral, Equiangular, Regular
Polygon.
After the activity students will be asked by the following;



What have you observed?
How did you identify the figures?
It is easy to identify those figure?
F. Abstraction
REGULAR POLYGON



A polygon is equilateral if all sides have equal
length.
A polygon is equiangular if all angles have equal
measure.
A regular polygon is both equilateral and
equiangular.
Some regular polygons have special names:
 A four – sided regular polygons – SQUARE.
 A three – sided regular polygon – EQUILATERAL
TRIANGLE.
PARTS OF POLYGONS
In naming a polygon, start with any vertex in consecutive order
either clockwise or counterclockwise.
Let us familiarize the terms below:
Consecutive Vertices -vertices of a polygon that include
the endpoints of the same side.
Consecutive Sides- are two sides of a polygon which share
a common angle.
Consecutive Angles- angles in a polygon that
share a segment as
one of the sides that
could be extended into
a ray.
Diagonal-
a
segment
joining
two
nonconsecutive
vertices of the polygon.
Vertex Angle- an angle formed by two consecutive sides. Also
called interior angle.
Central Angle- an angle formed by the segments joining
consecutive vertices to the center of a regular polygon.
Exterior Angle- an angle formed by a side and an extension
of an adjacent side.
G. Application
IV. EVALUATION
V. ASSIGNMENT
Teacher instructs the students to study the next lesson.
Prepared by:
Checked & Reviewed by:
MS. MARY SHANE A. VILLASOR
Pre-service Teacher
MRS. JAVENLY M. ROMERO
Cooperating Teacher