Hey! I'm not a native English speaker, so I don't understand what those big words mean xD. But all we know is that we don't know the actual positions and proportions. Btw I'm in 8th class so I don't really know that much but I'm pretty good in Maths. I don't really care with which way we approach this problem.Draw a horizontal line through E, and think about the parts above and below that line.
But before we actually do that, we need to clarify something. You drew the figure on graph paper, as if we know all the exact positions and proportions. Is that correct, or do we only know that it is a trapezoid? Do we even know that it is not isosceles, as shown?
Further, I can see many different ways to approach the problem, so I'd like to start with whatever ideas you have, rather than just picking a method that I happen to like, which might use ideas you don't know. For example, we could use formulas for areas of triangles and trapezoids; or we could use a geometrical construction, or we could use some theorems about areas.