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Question

A man goes 10 m due south and then 24 due west. How far is he from the starting point?

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Solution

Let the man starts from point D and goes 10 m due south and stops at E. He then goes 24 m due west at F.
In right DEF, we have:
DE = 10 m, EF = 24 m



DF2 = EF2 + DE2DF = 102 + 242 = 100 + 576 = 676= 26 m

Hence, the man is 26 m away from the starting point.

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