Question

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Answer 1

$\huge\rm\underline\purple{Answer:-}$

length of each sides of  polygon is 3.5cm

perimeter of polygon is 17.5 cm

Therefore ,

No of sides the polygon has = perimeter/length

                                               = 17.5/3.5

                                                =5 sides

hence , the polygon is a Pentagon [5 sides]

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Answer 2

Given that, The perimeter of polygon =17.5cm and the length of each side of polygon =3.5cm

⇒ Number of sides of the polygon =

$\frac{ \: perimeter \: of \: polygon}{length \: of \: each \: side \: of \: polygon} \\ \\ \cancel\frac{17.5}{3.5} = 5$

hence, the polygon have 5 sides (pentagon)