Half Square Triangles @Metroquilter
Those who follow me on Instagram know I love half
square triangles. I’ve tried lots of methods over the years but the method I
prefer is to chain piece my triangles and then trim to size. Other methods
include a) foundation paper pieced -which I find accurate but fiddly b) piecing
to size without trimming - never worked for me! c) 4 in 1 - lots of bias edges
and still have to trim.
We are going to make four 2.5inch half square
triangles, with the final piece being 4.5inch square.
Requirements
Requirements
(4) 3 inch
squares from your scraps
Instructions
Step one: Place two squares right sides together. You
will have two sets of two. 
Step two: Cut once
from corner to corner on the diagonal. This will give you four sets of
triangles. (You may want to mix the triangles up to ensure all four of the
finished half square triangles are different. Just remember that the triangles
need to be right sides together).
Step three: Chain piece
the triangles, using a quarter inch seam allowance. Snip the threads between
the triangles. 
Step four: Press each of the seams to the dark side. You
will now have four half square triangles ready for trimming. 
Step 5: With your ruler align the 45 degree line with
the diagonal of the block. Ensure that a 2.5 inch square can be made and trim
the first two sides of the block.
Step 6: Turn the block 180 degrees and again with
your ruler align the 45 degree line with the diagonal of the block. Keep the
ruler square with the two sides you have already trimmed, and trim the
remaining two sides to make a 2.5 inch square. 
Step 7: Arrange your four trimmed blocks as desired
into a square arrangement. 
Step 8: Sew the top two blocks together and the
bottom two blocks together using a quarter inch seam. Press the top and bottom
set in the opposite directions. Place the two sets of two blocks right side
together, nesting the seam. Sew together using a quarter inch seam. 
Step 9: Press the seams and you’re finished. The
finished block will be 4.5 inch square.
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I was lucky enough to have some Half square triangle units left over from the perfect HST BOM, so I used them to make this block. Cheating ? Definitely not, just using up my scraps. There are no rules in this sewalong:)
Visit our designers on Instagram to see their versions of this block : @cotefleurie @getahashtagkim @JustSewSue @lisasew @metroquilter @picosailors @pippaspatch @quirkyhannah @surfseasew @therunninghare
#scrapbagsampler
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