Go Back  Quiltingboard Forums > Main
Equilateral Triangle >

Equilateral Triangle

Equilateral Triangle

Old 09-26-2011, 08:25 AM
  #1  
Senior Member
Thread Starter
 
QuiltQtrs's Avatar
 
Join Date: Mar 2010
Location: NW Arkansas
Posts: 984
Default

How do I draft this .... all 3 sides being same length in inches?
(Tried it with a protractor, to get 60 degree angles.... no luck!)
QuiltQtrs is offline  
Old 09-26-2011, 08:33 AM
  #2  
Power Poster
 
Join Date: Mar 2009
Posts: 15,640
Default

You need a compass.

1. Draw the first line to the length you want.
2. Stick the compass in the end point and adjust it to the length of the line. Draw a circle.
3. Stick the compass in the other end point and draw a secong circle.
4. Where the circles intersect is the point of your triangle. Connect the end points and you got it.

OR

1. Draw the first line to the length you want it and mark the center point.
2. Draw a perpendicular line from the center point. (90 degrees up or down)
3. Measure the length of the first line and find the point on the perpendicular line that gives you the same length to one of the end points. Sorry - a bit convoluted to explain. I use a ruler and rotate it on the end point until I "get there"

Hope this helps.
MadQuilter is offline  
Old 09-26-2011, 08:33 AM
  #3  
Senior Member
 
qbquilts's Avatar
 
Join Date: Mar 2011
Posts: 767
Default

I'll tell you using a length of 8 1/2" for each side. You use the same method for other sizes.

Take a sheet of 8 1/2" x 11" paper. Fold it in half and crisp the fold so you've got two 4 1/4" x 11" rectangles. Unfold. Bring one corner up to the center fold line. Trace the 8 1/2" edge of the paper from the point on the center fold down to the corner. Unfold. Bring the corner that you just drew into up to the center fold line. It should it at the same point as before. Again trace the 8 1/2" edge of the paper from the point on the center fold line down into the corner of the paper. You've now got an 8 1/2" equilateral triangle. You can do this with any size paper. Just start out with a square that has the same length as the length of the triangle edge.
qbquilts is offline  
Old 09-26-2011, 10:15 AM
  #4  
Super Member
 
Join Date: Sep 2010
Location: Upper Michigan
Posts: 8,248
Default

Ok over my head! Bad at math! Hee hee. Glad there r ppl here to help ppl like me! Good luck with the triangles!!
Painiacs is offline  
Old 09-26-2011, 10:22 AM
  #5  
Super Member
 
eparys's Avatar
 
Join Date: Sep 2008
Location: New England, USA
Posts: 2,647
Default

If you have a compass - this is how you do it!

http://www.mathopenref.com/constequilateral.html
eparys is offline  
Old 09-26-2011, 10:41 AM
  #6  
Super Member
 
Glassquilt's Avatar
 
Join Date: May 2011
Location: Northeast IL
Posts: 2,064
Default

Equilateral triangle is a 60deg triangle. Do you have 60deg on your ruler or better yet a 60deg ruler?
Glassquilt is offline  
Old 09-26-2011, 10:51 AM
  #7  
Super Member
 
snipforfun's Avatar
 
Join Date: Jul 2010
Posts: 1,877
Default

I bought the Pyramid Ruler by Fons and Porter. I was making 2 quilts that had hundreds of split triangles so I saved myself the figuring and bought the ruler with a coupon. The pattern was Twirling Triangles.
snipforfun is offline  
Old 09-26-2011, 01:54 PM
  #8  
Power Poster
 
alikat110's Avatar
 
Join Date: Oct 2010
Location: Waco, Texas
Posts: 15,138
Default

You guys are good!!!
alikat110 is offline  
Related Topics
Thread
Thread Starter
Forum
Replies
Last Post
pumpkinpatchquilter
Main
14
12-30-2014 05:32 AM
crocee
Main
30
06-03-2014 01:11 PM
Boonedox
Main
28
01-17-2014 07:00 AM
ptquilts
Pictures
22
02-25-2011 02:06 AM
DebJ
Main
6
07-15-2007 03:42 AM

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is On
Trackbacks are Off
Pingbacks are Off
Refbacks are Off


FREE Quilting Newsletter


SEO by vBSEO ©2011, Crawlability, Inc.