What is the simplified form of the quantity 12 z-squared plus 7z minus 12 over the quantity 3 z-squared minus 2z minus 8 ?

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