If I was u I would use Photomath Bc it is super easy and answers almost all your answers
I am not completely sure but it's most likely the last option because congruent means equal and the two trapezoids can't be equal because of the different side lengths.
This can be solved by using the 30 60 90 triangle. The 30-60 side is equal to 2x, here it is 2x=18. The 60-90 side is equal to x. So this side is 18/2=9. The 30-90 side is by the way equal to the root of x, so here the root of 18
-7 Good luck with other questions!
#1. x= 5
(because it’s a 3,4,5 triangle and follows pythagorean theorem)
#2. x= 9
(225-144= 81, square root of 81 is 9)
#3. x= 8
(100-36= 64, square root of 64 is 8)
hope this helps!