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23-04-2022
Mathematics

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Find the length of side and the perimeter of a regular nine sided polygon with radius 5 units

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sabellaabdullah2000 sabellaabdullah2000

23-04-2022

Step-by-step explanation:

Nine sided polygon has an angle of 360/9=40 degrees at one vertex.

So the angles opposite the radius=(180–40)/2==140/2=70degrees.

solving for Base(side): 1/2s=5.cos70= 3.42 units Ans

P=9(5+3.42)=75.78 units Ans.

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