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24 votes
24 votes
Find the unknown side lengths and angle measures.

Round the lengths to the nearest tenth and the angle measures to the nearest degree.

Find the unknown side lengths and angle measures. Round the lengths to the nearest-example-1
User Saarthak
by
2.5k points

1 Answer

23 votes
23 votes

Answer:

Explanation:

m∠D = 90° - 51° = 39°

sin E =
(DE)/(DF) ⇒ DE = DF × sin E

DE = 18 sin51° ≈ 14.0 ft.

cos E =
(EF)/(DF) ⇒ EF = DF × cos E

EF = 18 × cos51° ≈ 11.3 ft.

Find the unknown side lengths and angle measures. Round the lengths to the nearest-example-1
User Greg Guida
by
2.7k points
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