The Math Forum

Search All of the Math Forum:

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

Math Forum » Discussions » Education » math-teach

Notice: We are no longer accepting new posts, but the forums will continue to be readable.

Topic: Re: Gnu Math Construction
Replies: 0  

Advanced Search

Back to Topic List Back to Topic List  
kirby urner

Posts: 3,690
Registered: 11/29/05
Re: Gnu Math Construction
Posted: Oct 27, 2013 3:29 PM
  Click to see the message monospaced in plain text Plain Text   Click to reply to this topic Reply

Re: GNU Math Construction

As a follow-up to this Jul 2006 thread, in Oct 2013:

The perpendicular rhombs described above in connection with
the Coupler and rhombic dodecahedron are given animated
treatment as a part of a multi-part Youtube series.
Director: K. Urner Screenwriter: D. Koski.

In this series, the idea of a Rhombic Book, two triangular
book covers symmetrical about a spine, and a page flapping
back and forth, another below at 180 degrees (optional), is
used to introduce three tetrahedrons:

(a) the one comprised of a left book cover and the page
(b) the one comprised of a right book cover and the page
(c) an "inadvertent one" comprised of the two varying
lengths at 90 degrees and opposite one another, other
lengths same as rhomb's.

(a) + (b) + (c) assemble a topological IVM in a way
described in the vids.

Also (a), (b) and (c) are all of same volume as one
another, though as the page revolves they cycle through
a minimum / maximum.

These concepts help reinforce / anchor some of the other
animations and demos we've been touring.

Kirby Urner
Oregon Curriculum Network

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

[Privacy Policy] [Terms of Use]

© The Math Forum at NCTM 1994-2018. All Rights Reserved.