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 ÷)