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The area of the regular pentagon is 6.9 cm2. What is the perimeter? 2 cm 5 cm 10 cm 20 cm

Ashley Howard

in Mathematics

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Kristi Hammond on September 2, 2018

Area of the regular pentagon is of 6.9 cm2.Find the perimeter of a regular pentagonTo proofFormulaArea of regular pentagon isas given in the question area of the regular pentagon = 6.9 cm2now to equate the value of the area with the formula area.Now put √5 = 2.24 ( approx)to put in the previous equationthusa2 = 4.01 a = √ 4.01 = 2.0 cm ( approx)As the perimeter represents the sum of all the sides.I.and regular pentagon has five sides of equal length.So perimeter of a regular pentagon = 5 × side length = 5 ×2.00 therefore, the perimeter of a regular pentagon = 10cmoption c is correct therefore resulted


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