Geometry

Question Analysis:  
This is an algebraic Pythagorean Theorem problem requiring equation setup and solving for .  
The main focus is on solving for an unknown side length in a right triangle.  

Key Concept Explanation:  
The Pythagorean Theorem applies:  
 
where , , and are the sides.  

Step-by-Step Solution:  
1. Identify given values:  
  - Smallest side:  
  - Middle side:  
  - Hypotenuse:  
2. Apply the Pythagorean Theorem:  
   
3. Expand terms:  
   
   
4. Simplify and solve for

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