Sheila is building an addition to a house. The points E(- 1 1/2, -2 1/2), F(4 1/2, -2 1/2), G(4 1/2, 3 1/2), and H (9-1 1/2, 3 1/2) are the points she plotted on a coordinate plane to draw the new room plan. What is the shape of the addition to the house? What is the perimeter in units? Please help me answer this!!!!!
