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Topic: Research on "Twice as big"
Replies: 19   Last Post: Feb 27, 2011 1:15 PM

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Dave L. Renfro

Posts: 4,792
Registered: 12/3/04
Re: Research on "Twice as big"
Posted: Jan 31, 2011 11:48 AM
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Jonathan Crabtree wrote (in part):

> Draw a square. Draw a square twics as big.

In my opinion, any such data you (or others) would get
is worthless unless you are unambiguously clear as to
what "twice as big" means in the statement of the question.
Depending on context, it could mean twice the linear
dimensions (relevant when measuring graphic line drawings
and making photocopy enlargements) or twice the area
(relevant when painting a wall or picking corn in
in a field). That said, when I was growing up it
was common to see advertisements in the back of
popular science magazines and comic books stating
that such-and-such microscope or telescope (often for
ads of so-called "pocket microscopes" and "pocket
telescopes" that were the size of very thick pencils)
magnified by something like 2500 areas.

Dave L. Renfro

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