The Puzzle of the Two Bridges

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Where should two bridges be built across two rivers separating Jack and Jill in order that the path from one to the other be as short as possible? (Each bridge is assumed to be perpendicular to its river.) This Demonstration shows where the bridges should be built as you change the positions of our two heroes.

Contributed by: Jaime Rangel-Mondragon (March 2011)
Open content licensed under CC BY-NC-SA




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