For the first one, the coordinates given form a Hexagon that can be split into a rectangle and 2 triangles by cutting lines from (3,7) to (3,1) and from (7,7) to (7,1). The rectangle in the middle would have width of 4 and height of 6.
Therefore the area of the rectangle would be 4 x 6 = 24.
The height of one of the two triangles is 3 and the base is 6, so the area of one of the triangles is 3 x 6/2 = 9
Then we have to do the perimeter.
The side length of one of the legs of the triangles is 3\(\sqrt2\)
3\(\sqrt2\) x 4 (amount of legs) = 12\(\sqrt2\)
The width of the rectangle is 4, 4 x 2= 8
The total perimeter would then be 12\(\sqrt2\) + 8