To find out the missing leg of a right triangle, you have to use the Pythagorean Theorem which is a^2 + b^2 = c^2. C is the hypotenuse. So, substitute the numbers into that equation. 
2^2 + 4^2 = x
4 + 16 = x
20 = 
 
 
        
        
        
Answer:
Using the formula, write in standard form.
f,−x10y15m5
Step-by-step explanation:
 
        
             
        
        
        
B={x|x is an even whole no less than 9}
Now

 
        
                    
             
        
        
        
The answer is B I hope you get it.