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Strike441 [17]
3 years ago
15

Simplify.

Mathematics
1 answer:
Hatshy [7]3 years ago
5 0
105 -3 1 (——— • ——) • — 10 10 2 <span>Step  2  :</span> 1 Divide -2 by — 2 <span>Equation at the end of step  2  :</span> 105 -3 (——— • ——) • -4 10 10 <span>Step  3  :</span> -3 Simplify —— 10 <span>Equation at the end of step  3  :</span> 105 -3 (——— • ——) • -4 10 10 <span>Step  4  :</span> 21 Simplify —— 2 <span>Equation at the end of step  4  :</span> 21 -3 (—— • ——) • -4 2 10 <span>Step  5  :</span>Final result : 63 —— = 12.60000 5 <span> 

hope this helps hope i am brainliest i need one more</span>
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Given

Area of the regular pentagon is 6.9 cm².

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To proof

Formula

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area of regular pentagon = 6.9 cm²

now equating the area value with the area formula.

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Now put

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put in the above equation

\frac{6.9\times 4}{\sqrt{5(5+2\times2.24)}}=a^{2}\\\frac{27.6}{\sqrt{47.4}}=a^{2}\\\frac{27.6}{6.88}=a^{2}

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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

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option c is correct

Hence proved









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