The general observations remain the same, but the specific changes swap. The x-coordinates would stay the same, while the y-coordinates would change their signs. The triangle would flip vertically instead of horizontally.
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Yes, by using the Baudhāyana-Pythagoras Theorem. The distance AD is the hypotenuse of a right-angled triangle. AD = square root of (4 squared plus 3 squared), which equals 5 units.
In a reflection across an axis, the shape, size and the coordinate corresponding to that axis remain the same. However, the sign of the other coordinate and the orientation (right-to-left) change.
(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.
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.