Answer: rotation and dilation
translation and dilation
Explanation:a
A rigid transformation is a transformation which does not change the size and the shape of the figure. It always produces congruent images.
Translation, rotation and reflections are types of rigid transformation.
But dilation is not a rigid transformation, it creates similar images but not of same size.
Therefore, the transformations that would change a triangle into one that is similar, but not congruent are :
rotation and dilation
translation and dilation