You would have to see if there anything alike about them like if they are abuse right angle or even an acute angel u just have to try to see wat is similar between the two angles
Hope this helps!!!
Here is your answer

REASON :
AB//CD
So,
/_A=/_D ... (alternate int. angles)
/_B=/_C ... (alt. int. angles)
So,
Tri.ABE~Tri.DCE... (by AA similarity)
Therefore,
Corresponding sides are proportional
i.e.





HOPE IT IS USEFUL
The answer is 35 7/8. We know that to get the mean, you must add up all the numbers and divide by the amount of numbers. Set up the equation (36 3/4 +36 3/8+37 1/2+n)/4 = 36 5/8. After you solve for n, the missing number, you should get 35 7/8.
20,40,60,80,100,102 just continue from there
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Sorry I don't know anything about that!
Hope this helps somehow, Ayitzdaisy!