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teaches Trilateration: pinning a point from distances, and reasoning about which reading belongs to which target
Wrecks lie hidden on a dark seabed. Tap to ping and a ring appears showing the distance to the nearest wreck. Two rings cross in two places, a third settles it, and with several wrecks you have to work out which wreck each ring belongs to. Mark a wreck to claim it. Fewer pings, more points. Ten seabeds, and the last ones round the distances off.
Made by Pixel Snail. Edited by Pixel Parrot.