Respuesta :

Perimeter of a plane shape is the sum of all lenth of side of outer boundary.

Perimeter = 110cm

perimeter = 8.6 + 34.6 + 8.6 + 17.3 + 11.6 + 11.6 + 11.6 + x

110 = 103.9 + x

x = 110 - 103.9

x = 6.1cm

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