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-   -   straight line (http://mymathforum.com/algebra/16548-straight-line.html)

outsos December 21st, 2010 05:49 PM

straight line
 
How do we draw a straight line??

greg1313 December 21st, 2010 07:34 PM

Re: straight line
 
To what degree of precision?

DLowry December 21st, 2010 09:59 PM

Re: straight line
 
I'm pretty fond of rulers myself, though I often use the straight side of a protractor because it makes me look smarter. My father was really level-headed, and for big lines we would trace the outline of his head.

What, exactly, are you looking for?

skipjack December 22nd, 2010 03:15 AM

Use Peaucellier's linkage.

DLowry December 22nd, 2010 11:32 AM

Re: straight line
 
Quote:

Originally Posted by skipjack

Whoa. This is a concept both new and interesting to me. On the A-Frame one, where he poses the question of whether we know why it goes in a straight line... why does it go in a straight line?

Phrzby Phil December 23rd, 2010 07:43 AM

Re: straight line
 
Use a slide rule and you'll look even smarter.

greg1313 December 23rd, 2010 08:47 AM

Re: straight line
 
Produce a 1-dimensional object in and you'll look like a (trivial) genius!

DLowry December 23rd, 2010 07:15 PM

Re: straight line
 
Perhaps we should assume the Greek's magical straightedge, which can draw a perfectly straight line between any two points no matter how far.


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