if the base is 46km and the other base is 26km and the height is 17km and the the little line in the middle say 11m wha tis the area

To find the area of a trapezoid, you can use the formula:

Area = ((b1 + b2) / 2) * h

Where:
- b1 and b2 are the lengths of the two bases of the trapezoid
- h is the height (or the perpendicular distance between the bases)

In your case, the length of one base is 46km, the length of the other base is 26km, and the height is 17km. However, you mentioned a "little line in the middle" with a length of 11m, which seems unrelated to the sides of the trapezoid. Could you please clarify the specific configuration of the trapezoid so that I can provide an accurate calculation?