1. Limited time only! Sign up for a free 30min personal tutor trial with Chegg Tutors
    Dismiss Notice
Dismiss Notice
Join Physics Forums Today!
The friendliest, high quality science and math community on the planet! Everyone who loves science is here!

Geodesic dome angles

  1. Sep 22, 2010 #1
    Any math wizards here willing to assist me in determining cut angles for parts to construct geodesic dome greenhouse. I am building a 13' diameter geodesic dome. I am using the info from geodesic dome calculators on line for a 2V version. It is composed of 6 pentagonal frames with internal struts that radiate to the 5 points on the pentagonal frames.Five pentagons create the walls and the 6th one is the roof. Triangle voids remain between the pentagons. I have cut the pentagon frame parts but need construction details on cutting the internal struts. The pentagon sides are 4.017' (48 3/16") and the internal struts are 3.552' (42 5/8"). A line from the center of each pentagon side to the center of pentagon creates a 20 degree angle. The 9/16 x 2 15/16 pentagon frames are mitered with a 20 degree bevel. I need cutting instructions for the internal struts that radiate from the points....any help would be appreciated.
  2. jcsd
  3. Dec 5, 2010 #2
    Is this a 2v form of icosahedron?

    I have a program that will allow figuring the angles.

    Email krazykyngekorny(@)gmail.com
Share this great discussion with others via Reddit, Google+, Twitter, or Facebook