9.04 Law of Cosines Quiz QUESTION 1 Can you use the Law of Cosines in the triangle below? Why or why not? QUESTION 2 Find the length of a if b = 15, and c = 21. QUESTION 3 Find if a = 34, b = 28 and c = 15. QUESTION 4 In the triangle below, you are given two measurements. What ONE other measurement would you need in order to use the Law of Cosines? QUESTION 5 Find the measure of angle P in the triangle below. QUESTION 6 Using the value found in the previous question, find the measure of angle R and the measure of angle Q. QUESTION 7 Find all the missing parts to the triangle below. QUESTION 8 Describe the two situations when you can use the Law of Cosines. QUESTION 9 What is the Law of Cosines? QUESTION 10 Can you use the Law of Cosines if you are given a = 41, b = 55 and ? Why or why not