In ΔLMN, n = 51 inches, ∠M=92° and ∠N=50°.

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In this triangle we know:

It's easy to find angle h by using 'angles of a triangle add to 180°':

L= 180° − 92° − 50° = 38°

We can also find side a by using The Law of Sines:

n/sin n = l/sin l

51/sin(50°) = L/sin(38°)

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