Answer: a = 8;  b = 15;  c = 17
Step-by-step explanation:
c = b + 2  and c = 2a + 1
b = c − 2 and a =  
c² = b² + a²  






 
c = 1 or c = 17
If c = 1 then b = 1 - 2 = -1, that's not possible
So x = 17
b = 17 - 2 = 15
a = 
Length sides of the triangle are 17 cm, 15 cm and 8 cm.
I saw some of this on a site but I want to make sure its correct so we're gonna apply the pythagorean theory and see if its correct.

This shows that this is correct.
Hope this helped! Again, some of this was from a site, not from me.
 
        
             
        
        
        
Answer:
2.964
Step-by-step explanation:
 
        
                    
             
        
        
        
It would look like this: O=C=O 
Hope this helps you out.
 
        
             
        
        
        
Answer:
See below
Step-by-step explanation:
Here we need to prove that , 

Imagine a right angled triangle with one of its acute angle as  .
 .
-  The side opposite to this angle will be perpendicular . 
- Also we know that , 


And by Pythagoras theorem , 

Where the symbols have their usual meaning.
Now , taking LHS ,

- Substituting the respective values,





Since LHS = RHS ,
Hence Proved !
I hope this helps.