two lines have the same non-zero slope and the same y intercept have the property that the sum of their slopes is 0. what is the sum of the x-coordinates of their x-intercepts?

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