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19 July, 07:39

1. Anthony walks to the pizza place for lunch. He walks 1km east then 1km south east again.

What distance did he cover? What was his displacement

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  1. 19 July, 09:55
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    The answer is: distance is 3 km, displacement is 2.24 km.

    Distance is total length: 1 km east + 1 km south + 1 km east again = 3 km

    Displacement is the hypotenuse of the right triangles which sides are 1 km east and 2 km south. According to the Pythagorean theorem:

    a² + b² = c²

    1² + 2² = c²

    1 + 4 = c²

    5 = c²

    c = √5

    c = 2.24 km
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