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A man goes 15 metres due west and then 8 metres due north. How far is he from the starting point?

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A man goes 15 metres due west and then 8 metres due north. How far is he from the starting point?

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Let the starting point of the man be O and final point be A.

In ΔABO, by Pythagoras theorem AO2 = AB2 + BO2

He is 17m far from the starting point.

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