Is it really d I thought it was a

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

First subtract 10 from both side
y^2+6y-16=0
(y+8)(y-2)=0
-8 and 2