Plus twice the thickness of the paper if you want it to go around the outside of a tube/drum.
On Mar 24, 6:25 am, "Paul McCool" <[email protected]> wrote: > Ok, time for ME to go back to Geometry class.... > > Paul M. > > > > ----- Original Message ----- > From: "Wolfgang Holzinger" <[email protected]> > To: <[email protected]> > Sent: Monday, March 23, 2009 11:21 PM > Subject: [Papermodels II 35211] Re: Need help with how to measure > > correctly... > > > Hi abbe > > >> I'm kind of new to this and need some help. I am trying to make a > >> straight piece so I can put it around a circle (like how a drum would > >> look)- can you tell me how I should mathematically measure this > >> please? Anyone know? I remember that it's a formula of some sort- just > >> forgot what it was. Thanks ahead of time. Also, I am creating a hand > >> our of paper and it's not going to well I am having problems > >> determining how to measure for some of the fingers? Anyone have any > >> suggestions? Hope someone will have some very good advice for me here. > > Let me see if I got you right (take a look at the attached > > picture): > > - you have the circle plate (green color) with a radius (white) > > - you want to make the strip (yellow part) and need the length of it > > If that is all you can calculate: > > length of strip: l > > radius of circle plate: r > > pi is a mathematical constant: 3.141592653... > > (If you don't know the number there is an easy way to calculate: > > take the numbers 1 3 5, double them 113355 and then divide > > 355 by 113 resulting in 3.141592920353982301 which is very > > close to pi) > > > Then the formula is: l = 2 * r * PI > > > Hope this helps > > > Best regards, Wolfgang > > > PS: I found a very good article about the number pi on > > wikipedia (http://en.wikipedia.org/wiki/Pi) > > > -- > > MfG Wolfgang Holzinger > > E-Mail: [email protected] > > > +--------------------------------------------------+ > > | Linux -- because life is too short for a reboot! | > > +--------------------------------------------------+- Hide quoted text - > > - Show quoted text - --~--~---------~--~----~------------~-------~--~----~ You received this message because you are subscribed to the Google Groups "Papermodels II" group. To post to this group, send email to [email protected] To unsubscribe from this group, send email to [email protected] For more options, visit this group at http://groups.google.com/group/Papermodels?hl=en -~----------~----~----~----~------~----~------~--~---
