The equation y+2=2(x-d) is the line that passes through the points (-1,-2) and (2,4). what is the value of d?

-2+2=2(-1-d)
0=2(-1-d)
0=-2-2d
2=-2d
-1=d

4+2=2(2-d)
6=2(2-d)
6=4-2d
2=-2d
-1=d

so the answer for d would be -1, I substituted the coordinates of x and y with the points to get the answer 

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