Question

rotation, then translation
rotation, then reflection
translation, then rotation
translation, then reflection

Explanation:

Step1: Analyze position - relation

Observe the relative positions of the shapes. Shape 1 to shape 2 has no translation.

Step2: Identify transformation type

To get from shape 1 to shape 2, a rotation about the common vertex occurs. To get from shape 2 to shape 3, a reflection across a vertical - like line passing through the common vertex occurs.

Answer:

rotation, then reflection