how to figure out dimension of rectangle with coordinates
1 From the coordinates of the corner points, calculate the width, height, then area and perimeter of the rectangle. 2  Then click on show details to check your result. ( 3 The results shown above are rounded off to one decimal place for clarity).4  Click reset.ou can also drag the origin point at (0,0). In coordinate geometry, the area of a rectangle is calculated in the usual way once the width and height are found. See Rectangle definition (coordinate geometry) to see how the width and height are found.