143 the i answer is 143
hope this helps
        
             
        
        
        
Multiply the tops and multiply the bottoms
Aka 
5*21
-------
7*25
And simplify
        
             
        
        
        
Answer:
5
Step-by-step explanation:
a=12 (height)
c=13 (hypotenous) 
b=? (base) 
By using Pythagoras theorm
We have, hypotenous sq=base sq+height sq
Let b =base SO, base sq=hypotenous Sq-height Sq 
=>base Sq =13sq-12sq
Base Sq =169-144
Base Sq =25
Base =5 (shifting the sq).... 
Hope it's helpful 
 
        
             
        
        
        
Answer:
14
Step-by-step explanation:
The diameter is the length from one point on the circle to another, passing through the center. The <em>radius </em>is the length from a point on the circle to its center, so we can always find the diameter by doubling the radius. In this case, with a radius of 7, our diameter is 7 · 2 = 14