Section 6-1
Polygons
Polygon
•
F
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.
•
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.
•
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.
•
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y
.
Examples of Polygons:
These are not Polygons:
Must have
at least 3 sides
to form a polygon.
P
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y
g
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.
Number of Sides
Name
3
Triangle
4
Quadrilateral
5
Pentagon
6
Hexagon
7
Heptagon
8
Octagon
9
Nonagon
10
Decagon
12
Dodecagon
n
n
-gon
Two Types of Polygons:
1.
C
o
n
v
e
x
:
I
f
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x
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N
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.
E
x
a
m
p
l
e
:
2
.
C
o
n
c
a
v
e
:
I
f
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w
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W
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p
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.
E
x
a
m
p
l
e
:
Regular Polygon
•
A
p
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l
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q
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a
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q
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g
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.
–
E
q
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l
a
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a
l
:
a
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f
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s
s
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c
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r
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t
–
E
q
u
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a
n
g
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a
r
:
a
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f
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s
a
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c
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t
Diagonal
•
A
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s
*The diagonals
are indicated
with dashed
lines.
Interior Angles of a
Quadrilateral Theorem
•
T
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s
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3
6
0
d
e
g
r
e
e
s
.
1
4
2
3