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Charles Gilman wrote on Thu, Sep 2, 2010 06:19 PM UTC:
Edited because I had miread your question as 'What is the square root of fifty?' and answered that. It is the square root of 50 because the sum of the squares of the two shorter sides of a right-angled triangle equals the square of the longer sides. The squares of the 5s are both 25, summing to 50, and the squares of 7 and 1 are 49 and 1, also summing to 50.

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