1 angle sum of a polygon stage 5 - year 9 press ctrl-a ©2009 – not to be sold/free to use
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Angle Sum Angle Sum of a Polygonof a Polygon
Stage 5 - Year 9Stage 5 - Year 9
Press Ctrl-APress Ctrl-A©2009 – Not to be sold/Free to use
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2 x 180o =360o
180o
180o
Quadrilateral Quadrilateral (4)(4)
4-24-2
Angle Sum of a Polygon
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3 x 180o =540o
180o
180o
180o
Pentagon (5)Pentagon (5)
5-25-2
Angle Sum of a Polygon
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4 x 180o =720o
180o
180o
180o
Hexagon (6)Hexagon (6)
180o
6-26-2
Angle Sum of a Polygon
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6 x 180o =1080o
180o
180o
180o
Octagon (8)Octagon (8)
180o
180o
180o
8-28-2
Angle Sum of a Polygon
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S =(n – 2)x180S =(n – 2)x180oo
Polygon (n)Polygon (n)
n sides =n sides =
Angle Sum of a Polygon
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Quadrilateral Quadrilateral (4)(4)
S = (n -2) x 180S = (n -2) x 180oo
= (4 -2) x 180= (4 -2) x 180oo
= 2 x 180= 2 x 180oo
= 360= 360oo
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Angle Sum of a Polygon
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Pentagon (5)Pentagon (5)
S = (n -2) x 180S = (n -2) x 180oo
= (5 -2) x 180= (5 -2) x 180oo
= 3 x 180= 3 x 180oo
= 540= 540oo
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Angle Sum of a Polygon
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Hexagon (6)Hexagon (6)
S = (n -2) x 180S = (n -2) x 180oo
S = (6 -2) x 180S = (6 -2) x 180oo
S = 4 x 180S = 4 x 180oo
= 720= 720oo
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Angle Sum of a Polygon
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Hexagon (8)Hexagon (8)
S = (n -2) x 180S = (n -2) x 180oo
S = (8 -2) x 180S = (8 -2) x 180oo
S = 6 x 180S = 6 x 180oo
= 1080= 1080oo
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Angle Sum of a Polygon
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S = (n -2) x 180S = (n -2) x 180oo
= (5 -2) x 180= (5 -2) x 180oo
= 3 x 180= 3 x 180oo
= 540= 540oo
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120120oo
8585oo
130130oo
130130oo
yyoo
yy ++ 130130 ++ 120120 ++ 8585 ++ 130130 == 540540yy ++ 465465 == 540540oo
- 465 -465- 465 -465 yy == 7474oo
Angle Sum of a Polygon
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S = (n -2) x 180S = (n -2) x 180oo
= (6 -2) x 180= (6 -2) x 180oo
= 4 x 180= 4 x 180oo
= 720= 720oo
66120120oo
130130oo
130130oo
mmoo
mm ++ 130130 ++ 120120 ++ 130130 ++ 120120 ++ 130130 == 720720mm ++ 630630 == 720720oo
-630 -630-630 -630 mm == 9090oo
130130oo
120120oo
Angle Sum of a Polygon