My Math Forum  

Go Back   My Math Forum > High School Math Forum > Elementary Math

Elementary Math Fractions, Percentages, Word Problems, Equations, Inequations, Factorization, Expansion


Reply
 
LinkBack Thread Tools Display Modes
May 5th, 2014, 11:40 AM   #11
Global Moderator
 
CRGreathouse's Avatar
 
Joined: Nov 2006
From: UTC -5

Posts: 16,046
Thanks: 938

Math Focus: Number theory, computational mathematics, combinatorics, FOM, symbolic logic, TCS, algorithms
Quote:
Originally Posted by v8archie View Post
The problem is, that a straightedge does not have any markings on it anyway!
Right.

Quote:
Originally Posted by v8archie View Post
And even if it did, it doesn't matter how you mark them, because it's just scaling.
I don't know about that. With a marked ruler you can make some constructions which are impossible with just a compass and straightedge. In particular, you can trisect an arbitrary angle:
Neusis construction - Wikipedia, the free encyclopedia

I believe a marked ruler gives you exactly the power of origami constructions (Huzita-Hatori).
CRGreathouse is offline  
 
May 5th, 2014, 01:42 PM   #12
Math Team
 
Joined: Dec 2013
From: Colombia

Posts: 7,690
Thanks: 2669

Math Focus: Mainly analysis and algebra
The second point was that if you have a marked ruler it doesn't matter whether it is marked in centimetres, inches, planck lengths or some made up units. All are equally powerful.
v8archie is offline  
May 6th, 2014, 05:00 AM   #13
Global Moderator
 
CRGreathouse's Avatar
 
Joined: Nov 2006
From: UTC -5

Posts: 16,046
Thanks: 938

Math Focus: Number theory, computational mathematics, combinatorics, FOM, symbolic logic, TCS, algorithms
Quote:
Originally Posted by v8archie View Post
The second point was that if you have a marked ruler it doesn't matter whether it is marked in centimetres, inches, planck lengths or some made up units. All are equally powerful.
Ah.
CRGreathouse is offline  
Reply

  My Math Forum > High School Math Forum > Elementary Math

Tags
impossible, impossile, task



Thread Tools
Display Modes


Similar Threads
Thread Thread Starter Forum Replies Last Post
impossible (prove that 0 = 1) KyVanchhay Algebra 16 June 11th, 2013 10:26 PM
Impossible object soroban New Users 0 May 4th, 2012 01:26 PM
Impossible to integrate? TheReanimator Calculus 8 October 29th, 2010 04:00 PM
The impossible conjecture Euzenius Number Theory 10 July 30th, 2009 04:43 AM
Is this possible or impossible? ITConsultant1996 Elementary Math 3 June 24th, 2009 11:50 PM





Copyright © 2019 My Math Forum. All rights reserved.