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find any points of discontinuity for the rational function.
y= (x+6)(x+2)(x+8)/(x+9)(x+7)

Points of discontinuity for the rational functions are values that makes a denominator zero:
x+9 = 0,  x +7 = 0
The points are : x=-9 and x = -7

You have 2 sides that are 2 cms and you have 6 sides that are 1/2 cm and you have 4 sides that are 1 cm. the smallest sides are 1/2 the medium sized sides are 1 and the smallest are 1/2. so to find the perimeter you have to add them all up together so your answer will be 11 cm's