Can someone me with these questions

What value of x will make the triangles similar by the sss similarity theorem?

To describe a sequence of transformations that maps triangle abc onto triangle a"b"c", a student starts with a reflection over the x-axis.how should the student complete the sequence of transformations to map triangle abc onto triangle a"b"c"? plz

Find an bif a = {3, 6, 9, 12) and b = {2, 4, 6, 8, 10).