Geometry

Question Analysis

The task is to find the length of side  in  using the Law of Cosines, given two side lengths (, ) and the included angle ().

 

Key Concept Explanation

The Law of Cosines formula is , where ,  are two sides of a triangle,  is the included angle between them, and  is the side opposite to angle . In , to find  (let , , , ), we apply .

 

Step - by - Step Solution

1. Identify values: Let , ,

Click "Show Answer" to reveal the answer and analysis