jacksontgray7 jacksontgray7
  • 11-04-2018
  • Mathematics
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What is the area of a regular pentagon with a side length of 9 millimeters and an apothem length of 6.2 millimeters

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jdoe0001 jdoe0001
  • 11-04-2018
PENTA=5, so the pentagon is a 5-sided polygon.

on side's length is 9, so all sides added, namely the perimeter is 9+9+9+9+9, or 45.  We know the apothem is 6.2.

[tex]\bf \textit{area of a regular polygon}\\\\ A=\cfrac{1}{2}(apothem)(perimeter)[/tex]
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