Answer:
See below.
Step-by-step explanation:
I am not familiar with the US method of 2 column proof nor the names of some of the postulates but I can give you the general method of proving this:
Draw the diagonal BD then prove that the 2 triangles BAD and BCD are congruent.
The side BD is common to both triangles and there are 2 pairs of equal alternate angles.
After proving congruency , it follows that the 2 pairs of sides are congruent.
