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Difficult?

© Copyright 2003, Jim Loy

What is the length of the diagonal?1. This classic puzzle has been in many books, with different numbers. Our rectangle is inscribed in a quarter circle. Can you figure out the length of the diagonal of the rectangle? Martin Gardner gives you one minute to solve it.

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2. Here is another classic puzzle. On the right I have dissected a square into four identical pieces. And the L-shaped figure has also been dissected into four identical pieces. Can you dissect a square into five identical pieces (of some shape)?

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Can you dissect a square into two squares?3. Can you dissect a square into two identical squares? On the left is an attempt. I drew one square (purple) of the correct size, and then tried to arrange the pieces into a second square. This process seems to go on forever. Of course there is a way to perform this dissection. What is the easiest way?

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