The Displacement of Harry Potter 2

Geometry Level 1

Harry is walking in Hogwarts from Potions class to Defense Against the Dark Arts class. He walks 5 meters along a hallway that goes North, then turns and walks 12 meters along another hallway that goes East. What is Harry's Displacement equal to?

13 meters 13 mm 13 cm 14 meters NS

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2 solutions

Caillen Tu
Jun 9, 2020

• It can't be 13 mm or 13 cm because they are too short.

• It can't be 14 m NS because there is no such thing as north-south.

So the answer is:

13 m

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Shaurya Shil
Jan 30, 2019

We just have to use the Pythagorean theorem. Displacement here is the hypotenuse of the right triangle with sides 5 and 12. (5)^2 + (12)^2= x^2 25+144=x^2 x^2=169 Therefore x= √169 => 13 m

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I can't see why you need to use the Pythagorean theorem when you can just use logic?

caillen tu - 1 year ago

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