The ratio of the corresponding sides in triangles I and II is 1. We can interpret this
ratio to mean that the sides of triangle II are 3 times the lengths of the corresponding
sides in triangle I. We say that the number 3 is the scaling factor for these two similar
triangles. Equivalently, we can say that the sides of triangle I are 1 times the length of
the sides in triangle II, in which case the scaling factor is 1
.