2 years ago

It would be great if i can get some help. Thank you. Include explanation please

Mathematics

1 answer:

NISA [10]2 years ago

7 0

We're given two sides and the included angle and asked to find the third side. That's the Law of Cosines.

$c^2 = a^2 + b^2 - 2 a b \cos C$

$c = \sqrt{15^2 + 20^2 - 2 (15)(20) \cos 50^\circ} \approx 15.5 \textrm{ feet}$

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