Drexel dragonThe Math ForumDonate to the Math Forum



Search All of the Math Forum:

Views expressed in these public forums are not endorsed by Drexel University or The Math Forum.


Math Forum » Discussions » sci.math.* » sci.math

Topic: curve construction
Replies: 2   Last Post: Oct 12, 2013 8:48 AM

Advanced Search

Back to Topic List Back to Topic List Jump to Tree View Jump to Tree View   Messages: [ Previous | Next ]
Ciekaw

Posts: 13
Registered: 11/24/12
Re: curve construction
Posted: Oct 11, 2013 7:05 PM
  Click to see the message monospaced in plain text Plain Text   Click to reply to this topic Reply

On Friday, October 11, 2013 11:10:28 PM UTC+2, RichD wrote:
> One can construct an ellipse as follows:
>
> pin 2 thumbtacks into a sheet, loop a string
>
> (tied at the ends) loosely around them, pull
>
> it taut, draw the ellipse with a pencil; the
>
> sum of the distances etc.
>
>
>
> Are there similar methods to draw a parabola
>
> and hyperbola?
>


hyperbola
http://www.ddm.fmph.uniba.sk/files/iktZSaSS/aplety/obr-aplety/drawhyper.gif

parabola
http://www.ddm.fmph.uniba.sk/files/iktZSaSS/aplety/obr-aplety/drawpara.gif

Ciekaw

P.S.

sine
http://www.narval.republika.pl/sinuscyrklem.jpg
paper wrapped on the roller
+ pair of compasses (typ: http://img.tfd.com/architecture/f0237-02.png )

r=2*R
r- spacing pair of compasses
R- cylinder radius



Point your RSS reader here for a feed of the latest messages in this topic.

[Privacy Policy] [Terms of Use]

© Drexel University 1994-2014. All Rights Reserved.
The Math Forum is a research and educational enterprise of the Drexel University School of Education.