Help plz, will mark brainliest

Answer:
AB=5
Step-by-step explanation:
Triangle TAB is similar to triangle TWE. This can be proven through AA congruency. Because line AB is parallel to line segment WE, angle TAB is congruent to angle TWE (corresponding angles) and angle TEW is congruent to angle TEW(corresponding angles). Now, having proved that triangle TAB is similar to triangle TWE, we know that similar triangles have proportional sides. We can do [tex]\frac{TB}{AB} = \frac{TE}{WE}[/tex], plug in values for [tex]\frac{4}{AB} = \frac{16}{20}[/tex] , simplify [tex]\frac{4}{AB} = \frac{4}{5}[/tex], both fractions have a four in the numerator and must be equal to each other so AB=5.