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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(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.