You didn't supply a list. The so-called rigid transformations of translation, rotation and reflection create congruent triangles.
Generally it's dilation by a factor about a point is preserves similarity but not congruency. Any transformation which includes such scalings but is otherwise rigid also preserves similarity but not congruency.
Dilation is scale factor, like a dilation scale factor of 2
Answer is 18 due to the theory cause
Answer is (0,3)
hope it helps
