square. The opposite angles are equal, the diagonals intersect at midpoint, opposite sides remain parallel, and the diagonals bisect the angles.
Have you discovered the solution yet? I'm a bit stuck.
The diver descends, resulting in a movement downwards of −20 feet. Begin with 20 negative tiles and divide them into 5 equal sets. Each set contains 4 negative tiles, indicating he descended at a speed of −4 feet per second.