construct trapezium
ad//bc are 3.3 apart ab=4.5cm angle a=120 degree bc=3.6cm angle b is obtuse

Dear student,
Your question is unclear.
In the question, it is given that, AD||BC, and $\angle$A = 120, and $\angle$B is obtuse.

Now, $\angle$B can not be obtuse, as $\angle \mathrm{A} \mathrm{and} \angle \mathrm{B}$ are supplementary angles.
Kindly recheck it and do get back to us.