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When a man walks 5m towards east and turns right and moves 12m the magnitude of his displacement is 13m how?
Pythagoras.
The right turn is assumed to be 90 degrees, and moving southwards.
This forms the two shorter sides on a right angled triangle.
They applying Pythagoras.
h^)2) = 5^(2) + 12^(2)
h^(2) = 25 + 144
h^(2) = 169
Don't forget to 'square root' both sides!!!!
Hence
h = sqrt(169) = 13 .
This is a classic Pythagorean triangle.
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