Answer:
72 degrees
Step-by-step explanation:
Not only is the trapezoid symmetric in this image, but you can find the sum of angles using 180(n-2), where n is the number of sides.
A trapezoid has 4 sides.
180(4-2) = 360
All the angles should add up to 360.
Then add and subtract.
360 - (108 + 108 + 72) = 72 degrees
This is a good way to check your answer.
