## 17.9 SQ Episosde 028 – Angles in Quilting: Part A Triangles

July 31, 2011It’s All about Triangles & Quilting!

We pay homage to one of the cornerstones of quilting – the lowly triangle!

Three sides, three angles, three major descriptions of triangles.

**1. Scalene triangle**

- 3 different length sides
- 3 different sized angles
- typically used in setting triangles
- easier to paper piece
- no lines of symmetry – cannot accidentally flip the block over to fix a mistake
- can be a right triangle (one angle = 90 degrees)
- typical triangle found in math class 30, 60, 90
- can be called half rectangle triangles in quilting

Found in:

- tilted blocks (as setting triangles)
- wonky blocks
- mariner’s compass blocks
- palm blocks
- birds of paradise blocks

Eye searing pink blocks are just SOME examples of scalene triangles in these blocks.

**2. Isosceles traingle**

- 2 equal length sides
- 2 equally sized angles
- most commonly found in quilting
- Half Square Triangle – HST
- Quarter Square Triangle – QST
- one line of symmetry, flip around the ‘odd’ angle
- can be a right triangle (HST, QST, flying geese)
- how you cut could have one bias edge (the hypotenuse) or two (the shorter legs)
- typical triangle found in math class 45, 45, 90
- triangle with an acute ‘odd angle’ – kaleidoscope block

Found in:

- pinwheel
- broken dishes
- flying geese
- ohio star
- hourglass
- square in a square
- friendship star
- spool
- maple leaf
- kalidescope …..

Look for the black triangle to see some of the isosceles triangles in these quilt blocks (there’s many many more)

**3. Equalateral triangle**

- 3 sides equal length
- 3 equally sized angles
- least commonly found in quilting
- 6 triangles can make a hexagon block
- all angles are 60 degrees – no exceptions
- 3 angles of symmetry, flip around any angle
- guaranteed to have 2 sides of bias edges

Found in:

- thousand pyramid blocks
- chevron designs
- strip pieced hexagons
- tumbling blocks
- bordered thousand pyramid blocks

Hmm

Look at the ~~yellow ~~any block to see the equilateral triangle (assuming the image doesn’t get squished somewhere)

**Triangle Math Websites:**

- Cool Math Types of Triangles

**Home Sewing Front**

Working on periodic spiral quilt – mostly basted, now need sewn together

Need an outline behind the spiral for it to stand out from the background

Exothermic quilt – see previous post about my place on this quilt as of a week ago.

Exothermic quilt on point:

Design decisions to make on the exothermic quilt:

- Borders are GOOD – do NOT fix them
- On point or not?
- If so, have to fix coping black/ grey inner border
- How much more black fabric to buy?
- Paralllelograms in the middle stay or go? – it provides good movement, but too much of a distraction??

HAVE YOU SEEN:

- a 5 x 8 sized graph paper notebook for sale? If so, what brand, where are you finding them, have you seen them online?
- I would love a notebook this sized to carry around more easily!

A MUST HAVE book for anyone wanting to hand / machine quilt with specific designs:

501 Quilting motifs: Designs for Hand or Machine Quilting from the editors of Quiltmaker Magazine

- Takes one motif and slightly changes it, multiplies it, rotates and flips it,
- gives dimensions on block size for motif found in book.
- looks easy to trace and adapt
- great resource
- hardbound
- spiral inside

If you want to Swap Charm (5 inch) squares, go to this swap on Swap – Bot:

I’m willing to join if there is a good & healthy number of people in the swap!

You have until Sept 2, 2011 to make your decision!

**Music**

From Mevio’s Music Alley

- Triangle Treasure by Aronus

- Honey Wine by Ukulele Jim

From Freesound.org

How about Moleskine for the graph notebook?

by Bananabanana August 5, 2011 at 8:25 amhttp://www.larrypost.com.au/brands/moleskine/moleskine-squared.html

not sure what size squares you are after..

[…] provide lots of challenges to piecing. These shapes are not typically pieced the same way as triangles and […]

by 18.7 SQ Episode 030 – Angles in Quilting: Part C Polygons « Scientific Quilter August 21, 2011 at 12:50 pmI was working with a set of templates developed by Doreen Speckmann called peaky and spike. I thought it was a 60 degree triangle but when I compared and lined up the templates the angles was less then 60 degrees. Do you know what angles are on the peaky and spike triangles templates? Just curious since I have been working with them. I do not remember how to measure the angles on a triangle.

Do you know which triangle is peaky and which one is spike?

I have been following this podcast series as I never got to attend an advanced math class… could not get through the non advanced classes.

Nonnie

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by NONNIE August 26, 2011 at 5:22 amhello!

by wholesomemidwestern May 29, 2013 at 12:07 amthere is a block in your post that i LOVE and am wondering if you know the name of it, or have the template? it is in the bottom row of the “scalene triangle” group. it looks like a large diamond.

thanks!

christina

Sorry Christina, I’ve been AWOL for awhile on this blog. EQ7 calls the block “Chinese Lanterns”. Can float you the pattern from it if you’re interested.

by scientificquilter June 18, 2013 at 3:15 pmyes please, would love that very much! 🙂

by wholesomemidwestern June 27, 2013 at 8:49 amWill send email with a jpg in it. Be on the lookout for an email from scientificquilter@gmail.com

by scientificquilter June 30, 2013 at 11:25 amActually I did send you an email to the same address you have listed here (thought so, but wasn’t certain). I can forward it somewhere else if that post didn’t get to you. (check spam box maybe). It’s the indiana alumni address I sent it to.

by scientificquilter June 30, 2013 at 11:27 ami checked junk mail and didn’t see it 😦 this is the only email i use

by wholesomemidwestern June 30, 2013 at 5:23 pmsorry, i just cleaned my inbox and did find it! yay! i will link up to you once i try it out 🙂

by wholesomemidwestern June 30, 2013 at 5:30 pm