The question is really: "which statement would explain why we can equate the lengths of the two line segments" - and there's really only one that's likely.
This becomes a nasty little quandary for the ethics department - and it'll be interesting to see what comes of it. The Chrome browser is not only fairly decent (ignoring the current lack of extensions), but evolving at what can only be considered to be an alarming rate, at least if your a competitor.
If I call you a mealy-mouthed anti-intellectual pompous turd-brained gutter rat with a Terry Schiavo-like IQ and all the sense one would expect from a decayed chunk of dog vomit, you think I should be fined or go to jail?
No, but I do think that you should work harder on your insults if you really mean them 'to cause substantial emotional distress'.
In any formula, constants (especially those obtained from handbooks) are to be treated as variables.