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06-02-2015
Mathematics

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A boy rides his bike 5 miles north then 12 miles west. How far is he from his starting point

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06-02-2015

Pythagoras theorem:
x^2 = 5^2 + 12^2 ;
x^2 = 169 ;
x = [tex] \sqrt{169} [/tex] ;
x = 13.

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