Answer:
The answer to your question is the ASA(Angle-Side-Angle) postulate
Explanation:
The reason this is not HL(hypotenuse leg) is because only one side, and two angles are marked as congruent, you need a congruent(equal measure) leg, hypotenuse, and right angle. In other words, you need a right triangle with a congruent hypotenuse, and leg ; tick marks, to indicate the sides have equal length(these are the slashes that go through the line or outline). An outline of the angle or tick on the outline corresponds to congruent angles.
Because you have two angles and a side, in the order of an angle then a side and then an angle, it is ASA.