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Triangle to Square   by Serhiy Grabarchuk, Jr.   Suppose you have a shape of an equilateral triangle with straight sides. Can you draw on a piece of paper a square with a pencil using this triangle as a ruler? No other tools for drawing or measuring are allowed. The square in the lower left corner is provided as an illustration. The actual size of the final square is up to you only.   Go to the Solution > PDF Version (41 KB) > Back to the Puzzles > If you liked this puzzle, please take a look at the related pencil-and-paper puzzle - Get the One. Posted: November 7, 2007   Last Updated: March 19, 2008

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