Posts Tagged ‘scalene’

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

July 31, 2011

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It’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:

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

From Freesound.org

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