But as it is two feet also on that side, it must be twice two feet?

It is.

Then the space is twice two feet?

Yes.

Well, how many are twice two feet? Count and tell me.

Four, Socrates.

And might there not be another figure twice the size of this, but of the same sort, with all its sides equal like this one?

Yes.

Then how many feet will it be?

Eight.

Come now, try and tell me how long will each side