Answer:
Vertex 2 = (3.5, 6.5)
Vertex 3 = (8, 2)
Vertex 4 = (8, 6.5)
Explanation:
Given that:
Perimeter, P = 18 units
Perimeter of a square = 4s ; s = side length
18 = 4s
s = 18/4
s = 4.5 units
If Vertex 1 = (3.5, 2) and all vertexes are located in quadrant 1
Vertex 2 = (3.5, 2+4.5) = (3.5, 6.5)
Vertex 3 = (3.5+4.5, 2) = (8, 2)
Vertex 4 = (8, 2+4.5) = (8, 6.5)