polygons

1. BY
TEENA THANKACHAN
MATHEMATICS
No. 28

2. A Polygon is a closed figure made by
joining line segments, where each line
segment intersects exactly two
others.
DEFINITION
A B
C D E
FG

3. SIMPLE AND COMPLEX
POLYGONS
A simple polygon has only one boundary and the
sides do not cross each other,otherwise it is a
complex polygon.
TYPES OF POLYGONS
A B
C D
EF

4. A regular polygon is a polygon whose sides are
all the same length, and whose angles are all
the same.
REGULAR POLYGONS
AB
C D
EF

5. A three – sided polygon. The
sum of the angles of a triangle
is 180 degrees
TRIANGLE
A
B C

6. A four-sided polygon. The sum
of the angles of a quadrilateral
is 360 degrees
QUADRILATERAL
A B
CD

7. A five – sided polygon. The
sum of the angles of a
pentagon is 540 degrees.
PENTAGON
A
B C
DE

8. A six-sided polygon. The sum of the
angles of a hexagon is 720 degrees
HEXAGON
A B
C
DE
F

9. A seven sided polygon. The
sum of the angles of a
heptagon is 900 degrees.
HEPTAGON
A
B
C
DE
F
G

10. An eight-sided polygon.The
sum of the angles of an
octagon is 1080 degrees.
OCTAGON
A B
C
D
E F
G
H

11. A nine-sided polygon. The
sum of the angles of a
nonagon is 1260 degrees.
NONAGON
A
B
C
D
EF
G
H
I

12. A ten-sided polygon. The sum
of the angles of a decagon is
1440 degrees.
DECAGON
A B
C
D
E
FG
H
I
J

13. THE END