Geometry

Question Analysis:  
This question tests understanding of the 1:1:√2 ratio in isosceles right triangles.  
The main focus is reversing the theorem to find legs given the hypotenuse.  

Key Concept Explanation:  
For isosceles right triangles:  
 
Rationalizing gives:  
 

Step-by-Step Solution:  
1. Given: Hypotenuse cm.  
2. Apply ratio:  
 

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