Law of Cosines

Question 1

In triangle MNP, m = 5 cm, n = 4 cm, and p = 8 cm. Which formula can you use to find P?

Revolt · Accepted Answer

Answer image: //media.edgenuity.com/EVresources/3111-14-52-20-01-task/mc001-3.jpg

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

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

Revolt · Accepted Answer

✔ SAS

Question 4

Which formula can you use to find b?

Revolt · Accepted Answer

Answer image: //media.edgenuity.com/EVresources/3111-14-52-20-02-task/mc001-3.jpg

Question 5

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

Revolt · Accepted Answer

79°

Question 6

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

Revolt · Accepted Answer

2.2

Question 7

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

Revolt · Accepted Answer

81

Question 8

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

Revolt · Accepted Answer

66

Question 9

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 10

Rounding each angle to the nearest degree: degrees

Revolt · Accepted Answer

115

Law of Cosines Answers