$\textbf{Question:}$ It says on Wikipedia that an enlargement of a figure can be described when the scale factor exceeds one. Shouldn't it be when the absolute value of the scale factor exceeds one (i.e. $|\lambda|>1$)?
$\textbf{Opinion:}$ I also wanted to point out this question has been brought up here as well. The problem I see here is that the definition for $\lambda$ is never defined to be new distance over old. It is clear that a figure is getting larger iff $|\lambda|>1$ for this situation. I think an enlargement should be defined here to be when $|\lambda|>1$ which then implies $|\lambda|$ is the ratio of which distances are multiplied. However, that is just my opinion.