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What is the ratio of the width to length of a folded sheet of paper if the rectangle formed when the sheet is folded in half (as shown below) is similar to the original rectangular sheet? Express your answer as a common fraction in simplest radical form. (Assume the width of the original sheet of paper becomes the length of the folded sheet.)
 

 Jul 10, 2021
 #1
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The answer is sqrt(5)/2.

 Jul 10, 2021
 #2
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but how?

Guest Jul 11, 2021

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