Describing and Comparing Properties of Polygons.pptx

1. Lesson 63. Describing and
Comparing Properties of
Polygons
( Regular and Irregular
Polygons )

2. Drill
Identify the different geometric figures
90°
90°

3. . I am a 3-sided polygon
with congruent sides
. Game : What am I?
equilateral
triangle
I have one pair of parallel
sides trapezoid

4. . All my 4 sides are congruent
and no right angles rhombu
s
My 4 sides are equal. All
my sides form right
Isoscele
s
triangle
. I am a 3- sided polygon
with 2 congruent sides
square

5. Look at our blackboards.
Do they have the same size
and shape?
Look around the room.
What objects have
the same size and shape?

6. . Presentation
Present these figures

7. How many sides are there in
the polygons shown ?
What do you call a
polygon with 5 sides?
Are they the same? Why?
How do they differ?

8. Performing the Activities
Material : cut-outs of 5-12 sided
polygons.
Mechanics :
a. Group the pupils into four.
b. She or he distributes cutouts placed
in an envelope.
c. Let the pupils paste the cutouts
intended for the different column as shown

9. Cutout Numbe
r of
sides
Name
of
polyg
on
Length of
each side
(same or
not same)

10. Call a leader to report for the group
. What are the different
kinds of polygon?
 What is a regular
polygon? Irregular
polygon?

12. Summarizing the Lesson
Ask: What are polygons?
How are they classified?
Differentiate regular from irregular polygons
Polygons are closed plane figure that formed by the
line segments that meet only at their endpoints.
 Polygons are classified according to the number of
their sides and angles.
 Polygons may either be regular or irregular.
Regular polygons have all sides congruent. Irregular
polygons have noncongruent sides.

13. Assessment
Name each polygon by the the number of its sides. Tell
whether it is regular or not regular
1 2 3 4 5

14. Identify each polygon. State whether it is regular or
not.
Home
Activity
E F G