Answer:
B. 25 degrees 
Step-by-step explanation:
i think
 
        
             
        
        
        
sum of two angles of triangle are equal to the exterior angle of triangle 
 
        
                    
             
        
        
        
Answer:
25 ft
Step-by-step explanation:
This is a right triangle, so we can use the Pythagorean theorem
a^2+b^2 = c^2  where a and b are the legs and c is the hypotenuse
15^2 + 20 ^2 = x^2
225+400= x^2
625 = x^2
Take the square root of each side
sqrt(625) = sqrt(x^2)
25 = x
 
        
             
        
        
        
Answer:
Answer in pictures attached.
Step-by-step explanation:
You're welcome!