Triangle Fourplay – An Easy Quilt Block of the Month – Block 3

Block 3 of my block of the month project

block of the month block 3

Last Updated on 09/28/21 by Rose Palmer

Time flies when you are having fun quilting. It is time again to share another quilt block in my personal quilt block of the month project.

It has been a hot and humid summer as is typical in the US mid Atlantic which means I have been staying inside quite a bit. Between the heat and not traveling right now, I have had a lot of time to work on quilting projects. I developed and finished an original quilt design with which I will be starting my own Etsy shop where I will be selling my quilt patterns. But more about that next month.

This month I chose to work with a summery lime green shade for my monthly quilt block and chose a 4 patch Half Square Triangle unit that I am calling “sailboat”. As I have mentioned before, for this Quilt Block of the Month project, I am exploring the many geometric possibilities of combining 4 Half Square Triangles (HST).

Triangle Fourplay – Quilt Block of the Month Block 3

This is what the “sailboat” block looks like:

And this is what it looks like in fabric:

Using my quilt design software, I played around with the different geometric possibilities maintaining some form of symmetry since that is what we quilters like.

Using my fabric 4 HST units, I tried the various possibilities to decide which large block I ultimately wanted to put together.

As with the previous blocks I made in this series, I sewed a “positive” and “negative” version where I highlighted the different parts of the pattern with the colored fabric.

I also  made the block in a scrappy version with my Kaffe Fasset scraps.

And for my red and cream quilt, I also put together the same block using two different red fabrics, which also gives the design a different look.


For a totally different version and look using this same 4 patch HSQ unit, check out my Chihuly’s Garden Quilt.

If you also want to make these blocks here are the measurements and fabric requirements.

My starting half square triangle is 3.5 inches square. Once I’ve sewn 16 of them into a block, the size of the sewn block is 12.5 inches square which will finish at 12 inches in the quilt.

Read about my quick and easy method for making half square triangles.

Fabric requirements

For each 12 inch finished block using two colors:

  • Fat eighth or 1/8 yd of two contrasting colors, OR
  • Enough fabric to cut 8 x 4 inch squares of each fabric color

For a quilt with twelve 12 inch blocks I am thinking I will need:

  • 2.5 yards of each of two contrasting fabrics for the 12 blocks
  • 3/4 yard fabric for sashing
  • 1/3 to 1/2 yard for each border
  • 1/2 yard for binding

Check out the rest of the designs in this block of the month series:

Block 1Block 2, Block 4, Block 5Block 6


See you next month. Thanks for visiting.



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Block 3 of an easy quilt block of the month program

Sharing block three of my easy quilt block of the month program