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Math·Geometry and Trigonometry·Right triangles and trigonometry

hard

In the figure, $\overline{BC}$ is parallel to $\overline{DE}$. If the length of $DE$ is $129$ and the length of $AE$ is $215$, what is the value of $\tan x^{\circ }$?

A

$\frac{129}{172}$

B

$\frac{129}{215}$

C

$\frac{172}{129}$

D

$\frac{215}{129}$