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

Given

Area of the regular pentagon is 6.9 cm².

Find out the perimeter of a regular pentagon

To proof

Formula

Area of regular pentagon is

As given in the question

area of regular pentagon = 6.9 cm²

now equating the area value with the area formula.

Now put

√5 = 2.24 ( approx)

put in the above equation

thus

a² = 4.01

a = √ 4.01

a = 2.0 cm ( approx)

As perimeter  represented the sum of all sides.

i.e regular pentagon have five sides of equal length.

Thus

perimeter of the regular pentagon = 5 × side length

                                                         = 5 ×2.00

therefore the perimeter of the regular pentagon = 10cm

option c is correct

Hence proved

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mean or average is 40.6

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the practice of taking someone else's work or ideas and passing them off as one's own.

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