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Homework Statement
A room has dimensions 2.75 m (height) multiplied by 3.80 (width) m multiplied by 4.00 (length) m. A fly starting at one corner flies around, ending up at the diagonally opposite corner.
(a) What is the magnitude of its displacement?
Homework Equations
A^2=Ax^2+Ay^2
The Attempt at a Solution
the equation only has two unknowns while the question has three, were should i start.