Answer:
 First option and Fourth option.
Step-by-step explanation:
 To solve this exercise you need to use the following Trigonometric Identity:
 
 In this case you know that:
 
 Since triangle ABC is similar to triangle DEF:
 
 Let's begin with the triangle ABC.
 You can identify that:
 
 Then, substituing values, you get:
 
 In triangle DEF, you know that:
 
 So, substituing values, you get:
 
 
        
             
        
        
        
Answer:
median is the best measure 
Step-by-step explanation:
center = center position 
-> median is the best measure 
 
        
             
        
        
        
Answer:
25
Step-by-step explanation:
As the triangles within the bigger triangle are similar, the sides are in proportion.
⇒ 
⇒ 
⇒ 3w = 75
⇒ w = 25
 
        
                    
             
        
        
        
Me lol cant do disappointed
        
                    
             
        
        
        
Step-by-step explanation:
I hope you got the hang of it.
I didn't had a place to draw the verbal questions, so I just did them in my head - if you want to understand it better 
I suggest that you draw those triangles 
If you have any questions about the way I solved it, don't hesitate to ask me in the comments below ÷)