a) Find the perimeter of a rectangle if three of its vertices are (5,-2), (-3, -2), and (-3, 3). b) Find the area of a triangle whose vertices have coordinates (0, 9), (0, -4), and (5, -4). Describe what you did to solve each problem. Looking at the ordered pairs, did you see a correlation of the y-coordinate? Could you have solved this without graphing? If so, how?