# Wired Up

Classical Mechanics Level pending

A piece of uniform wire is bent intro three sides of a square $$ABCD$$ so that the side $$AD$$ is missing.

If it is first hung up by the point $$A$$ and then by the point $$B$$, the acute angle between the two directions of $$BC$$ is $$\arctan{x^\circ}$$. Find $$x$$.

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