The diagram is not drawn to scale, but the measurements of the line segments and the right angles are correctly labeled. As shown in the diagram, $BE = EC.$ Are the red and blue triangles similar? If so, enter the name of the side of the blue triangle that corresponds to $AB.$ If not, enter "no."
ALSO
The lengths of four sides of a trapezoid have ratios The area of the trapezoid is What is its perimeter?
I assume this is an AOPS problem, I also assume that you forgot to provide a picture. Whoops!