Answer:
(Going clockwise from top left.) Rotation, Reflection across the x-axis, Reflection across the y-axis, translation.
Explanation:
In picture one, the triangle seems to be rotated.
In picture two, the triangle is reflected across the x-axis.
Picture 3 has the triangle reflected as well, but this time it is across the y-axis.
Picture 4 has the triangle translated. It has no change in mirroring but it has a change in position.
Brainilest Appreciated.