(i) The fourth foot is at (8, 7). (ii) It depends on light and space. (iii) Width is 2 units, length is 3 units. Height cannot be determined from a 2-D coordinate plane.
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The bathroom door width is the difference between y-coordinates: 4 minus 1.5 equals 2.5 units. Since the room door is also 2.5 units wide, both doors have exactly the same width.
With D1 at (9, 0) and R1 at (11.5, 0), the width is 2.5 units (50 cm if 1 unit = 20 cm). This is quite narrow and would not easily accommodate a wheelchair.
The coordinates of point D1 are (9, 0). This means the point is located 9 units to the right of the origin along the x-axis and has no vertical displacement from it.
The door’s distance from the left wall is its x-coordinate, which is 9 units. Its distance from the x-axis is its y-coordinate, which is 0 units as it lies on the horizontal axis.