These two triangles can be shown to be congruent using which transformation? a) reflection over the x-axis b) reflection over the y-axis c) translation right 4 units d) rotation of 180 degrees

This is B) A reflection over the y-axis.

Step-by-step explanation:

You can tell this in a picture due to the fact that each point on the corresponding triangle is equidistant from the y-axis. Take the point at the bottom for instance. In both pictures, it is 2 spaces away from the y axis.