Answer: It depends on how much they are asking if you want to hang out with you, how much time they spend with you after you guys are hanging out, maybe they just hang out with you for a specific reason, etc. There are a lot of reasons but in my opinion it depends.
The line CD is the median of thre trapezoid, therefore its measures is shown below: You must sum the largest base and the shortest base and divide both of them by 2, as following: CD=(4.5+2.5)/2 CD=7/2 CD=3.5 Therefore, as you can see, the measure of the line CD is 3.5 The answer is: 3.5
It depends on the person, I personally work better plugging in numbers and practicing with numbers I like. I say just try different ways and see what works best for you.