Answer:
a straight line at an angle of 90° to a given line, plane, or surface.
Step-by-step explanation:
 
        
                    
             
        
        
        
Answer:
141/2, 279/4
Step-by-step explanation:
 
        
                    
             
        
        
        
Answer:
Es 60
Step-by-step explanation:
 
        
                    
             
        
        
        
The ladder resting against the house forms a triangle similar to the one in the image below
To answer this question you must use Pythagorean theorem

a and b are the legs (the sides that form a perpendicular/right angle)
c is the hypotenuse (the side opposite the right angle)
In this case...
a = x
b = 4
c = 20
^^^Plug these numbers into the theorem

solve for x
 + 16 = 400
 + 16 = 400
 = 384
 = 384
x = 8√6
or
x ≈ 19.5959....
Hope this helped!
~Just a girl in love with Shawn Mendes
 
        
             
        
        
        
2x2x5x5 or 2^2*5^5 hope this helps!