In ΔFGH, f = 800 inches, ∠F=21° and ∠G=45°.

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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°':

h= 180° − 21° − 45° = 114°

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

f/sin f = h/sin h

800/sin(21°) = h/sin(114°)

h = (800 × sin(114°))/sin(21°) h= 2040 inch

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