Law of Cosines

Question 1

Use the information to answer the questions.In triangle ABC, a = 11 in., , andc = 9 in. Which information about the triangle is given? ASASASSSASSS

Revolt · Accepted Answer

SAS

Question 2

What is b, rounded to the nearest tenth?3.8 in10.4 in✔ 11.6 in16.4 in

Revolt · Accepted Answer

✔ 11.6 in

Question 3

Using the sum of the angle measures of a triangle, °.

Revolt · Accepted Answer

Cannot be determined from the provided information

Question 4

Using the law of cosines, what is to the nearest degree?

Revolt · Accepted Answer

79°

Question 5

Using the law of cosines, , rounded to the nearest tenth.

Revolt · Accepted Answer

Cannot be determined from the provided information

Question 6

Gabe tried to use the law of cosines to find an unknown angle measure in a triangle. His work is shown. What is Gabe’s error?

Revolt · Accepted Answer

Gabe should not have subtracted 56 from 16 + 49.

Question 7

Rounding each angle to the nearest degree: m angle A similar to. degrees

Revolt · Accepted Answer

115

Question 8

m angle B similar to. degrees

Revolt · Accepted Answer

27

Question 9

Cheyenne and Jacob are geocaching. They are currently hiking on a main trail at a bearing of N 45° E. They determine that the cache should be about 1.5 miles off the trail at a bearing of N 17° E. If they want to hike to a point 3 miles further along the main trail once they have located the cache, they will hike an additional 1.0 miles✔ 1.8 miles2.7 miles3.3 miles.

Revolt · Accepted Answer

✔ 1.8 miles

Question 10

Use your answer above to find To the nearest degree, °

Revolt · Accepted Answer

Cannot be determined from the provided information

Law of Cosines Answers

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