Polygons: Classification and KInds

This will help you in describing a polygon or not. You will also learn how to name and classify polygons according to the number of sides.

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1. Grade 7–Mathematics
Quarter III
POLYGONS

2. POLYGONS
Prepared by:
Jo-Ann E. Rogon

3. Activity 1: “POST –IT!”
Draw any shape or figure
of your choice.

4. Column AColumn B

5. What is a POLYGON?
-from the Greek
word POLYmeans
many and GON
which means angle.
A polygon means
“many angles”.

6. What is a POLYGON?
-a 2-dimensional (flat)
figuremade up of
three or more straight
line segments.

7. What is a POLYGON?
-a closed
plane figure
where two
sides exactly
meet at a
vertex.

8. TYPES OF POLYGON
CONVEXCONCAVE REGULARIRREGULAR

9. CLASSIFICATIONS OF POLYGONS
NO. OF
SIDES
NAME OF
POLYGON
3 Triangle
4 Quadrilateral
5 Pentagon
6 Hexagon
7 Heptagon
8 Octagon
NO. OF
SIDES
NAME OF
POLYGON
9 Nonagon
10 Decagon
11 Undecagon
12 Dodecagon
13 Tridecagon
n n-gon

10. CLASSIFICATIONS OF POLYGONS

11. PARTS OF A POLYGON
side
vertex
angle
diagonal
4
4
4
2

12. NAMING A POLYGON
A B
D C
Sides: ��, ��,��,��
Vertices: A, B, C and D
Angles: ∠??????,∠??????,∠�,∠�
Diagonals: ��??????????????????��
Name: Quadrilateral ABCD

13. Complete the table.
PolygonNameSidesAnglesVerticesDiagonals
B
A
C
A
D B
C
A
E
B
C
D