wu :: forums
« wu :: forums - Wasted Space »

Welcome, Guest. Please Login or Register.
Mar 21st, 2025, 1:01pm

RIDDLES SITE WRITE MATH! Home Home Help Help Search Search Members Members Login Login Register Register
   wu :: forums
   riddles
   easy
(Moderators: Icarus, william wu, Grimbal, ThudnBlunder, SMQ, towr, Eigenray)
   Wasted Space
« Previous topic | Next topic »
Pages: 1  Reply Reply Notify of replies Notify of replies Send Topic Send Topic Print Print
   Author  Topic: Wasted Space  (Read 643 times)
Noke Lieu
Uberpuzzler
*****



pen... paper... let's go! (and bit of plastic)

   
WWW

Gender: male
Posts: 1884
Wasted Space   WastedNet.gif
« on: Feb 19th, 2009, 6:05pm »
Quote Quote Modify Modify

(seems like an obvious question, but couldn't find somethign like it)
 
Make a net of 1x2x3 rectangular prism.
Bound that net with a rectangle.
 
Which net wastes the most space compared to its rectangle, which the least?
 
(to help clarify, an example with tetrahedron nets)
IP Logged


a shade of wit and the art of farce.
towr
wu::riddles Moderator
Uberpuzzler
*****



Some people are average, some are just mean.

   


Gender: male
Posts: 13730
Re: Wasted Space  
« Reply #1 on: Feb 22nd, 2009, 8:50am »
Quote Quote Modify Modify

So by "net", do you mean an unfolded surface of those objects?
I'm not familiar with the term (but obviously once has to be the first time).
IP Logged

Wikipedia, Google, Mathworld, Integer sequence DB
rmsgrey
Uberpuzzler
*****





134688278 134688278   rmsgrey   rmsgrey


Gender: male
Posts: 2874
Re: Wasted Space  
« Reply #2 on: Feb 22nd, 2009, 8:58am »
Quote Quote Modify Modify

on Feb 22nd, 2009, 8:50am, towr wrote:
So by "net", do you mean an unfolded surface of those objects?
I'm not familiar with the term (but obviously once has to be the first time).

 
Yes, "net" is a standard term for a planar shape that can be folded to form the surface of a 3D object.
IP Logged
Grimbal
wu::riddles Moderator
Uberpuzzler
*****






   


Gender: male
Posts: 7527
Re: Wasted Space   box123.gif
« Reply #3 on: Feb 22nd, 2009, 1:57pm »
Quote Quote Modify Modify

Something like this?
IP Logged

Noke Lieu
Uberpuzzler
*****



pen... paper... let's go! (and bit of plastic)

   
WWW

Gender: male
Posts: 1884
Re: Wasted Space  
« Reply #4 on: Feb 22nd, 2009, 9:30pm »
Quote Quote Modify Modify

yes.
and no- nets (from what I understand...) require 1 polygon per face...
nice solution though. Been struggling with showing why what I think is the answer is the answer... but that's why I left it in easy.
IP Logged

a shade of wit and the art of farce.
ThudnBlunder
wu::riddles Moderator
Uberpuzzler
*****




The dewdrop slides into the shining Sea

   


Gender: male
Posts: 4489
Re: Wasted Space  
« Reply #5 on: Feb 23rd, 2009, 7:26am »
Quote Quote Modify Modify

on Feb 22nd, 2009, 1:57pm, Grimbal wrote:
Something like this?

I thought it would be obvious the answer to this self-descriptive problem is that nets of zero (or imaginary) dimensions waste the least space. Tongue If anybody gets awkward and insists on 3 dimensions, we can always compactify them while they are not looking. Welcome to the world of dimensional dementia.  
« Last Edit: Feb 26th, 2009, 9:01am by ThudnBlunder » IP Logged

THE MEEK SHALL INHERIT THE EARTH.....................................................................er, if that's all right with the rest of you.
Pages: 1  Reply Reply Notify of replies Notify of replies Send Topic Send Topic Print Print

« Previous topic | Next topic »

Powered by YaBB 1 Gold - SP 1.4!
Forum software copyright © 2000-2004 Yet another Bulletin Board