Geometry

Question Analysis

This problem is about using the Law of Cosines to find the length of side  in , with two side lengths (, ) and the included - angle () given.

 

Key Concept Explanation

The Law of Cosines formula is . In , to find side , we use .

 

Step - by - Step Solution

1. Identify the values: Let , , and .

2. Apply the Law of Cosines:

Calculate the squares of the sides:

Click "Show Answer" to reveal the answer and analysis