In ΔDEF, d = 92 cm, e = 42 cm and ∠F=141°. Find the length of f, to the nearest centimeter.

asked Apr 6, 2021 185k views

2 votes

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6 votes

Answer:

f=127 cm

Explanation:

Law of Cosine:

x squared=92 squared+42 squared-2(92)(42)(cos 141)

x squared =8464+1764-7728(cos 141)

x=127 cm

Beltran answered Apr 12, 2021

3.3k points

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