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Kerri Checchia

on 19 April 2010

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Transcript of Perimeter

Perimter What is perimter? The distance AROUND a polygon To find the perimeter of any polygon:
ADD the sides 9 + 5 + 11 = 25 cm There are also formulas that can
be used to solve for the perimeter of regular
polygon & a rectangle. Formula: Regular Polygon:
P= (n)s P= (n)s
P= (8)2
P= 16 Formula for the perimeter
of a rectangle:
P= 2(l+ w) P= 2(l + w)
P= 2(3 + 6)
P= 2(9)
P= 18 Let's practice some Find the perimeter
of this irregular polygon
Find the perimeter of this
nonagon- Sides are 14 cm Fins the perimeter of this
triangle Find the perimeter of
this rectangle
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