SOCRATES: Good; and is not a space of eight feet twice the size of this, and half the size of the other?
BOY: Certainly.
SOCRATES: Such a space, then, will be made out of a line greater than this one, and less than that one?
BOY: Yes; I think so.
SOCRATES: Very good; I like to hear you say what you think. And now tell me, is not this a line of two feet and that of four?
BOY: Yes.
SOCRATES: Then the line which forms the side of eight feet ought to be more than this line of two feet, and less than the other of four feet?
BOY: It ought.
SOCRATES: Try and see if you can tell me how much it will be.
BOY: Three feet.