Half Square Triangles have to be one of my favorite blocks to sew. They are simple, look good in nearly any fabric choices, and can be used to make countless combinations. I have several HST Quilts that are currently in the works, so I decided to do a simple Half Square Triangle Tutorial so you can make some too! There are several different ways to make them, each having their own pros and cons, so I am going to be doing a series on them this month covering all the different ways to piece HST’s, some quick HST math cheat sheets, the different patterns that can be made using HST’s, and what type of piecing method is best for what type of project.
This is the first installment of the Half Square Triangle Series. You can see all of the Half Square Triangle Series below:
- Method I – Simple Half Square Triangle Tutorial
- Method II – HST Tutorial 4 at a Time
- Method III – The Magic 8 Method – Make 8 HST at Once
HALF SQUARE TRIANGLE TUTORIAL – METHOD I
- To make HST place two equal size square Right Sides Together (RST). Mark a diagonal line on the wrong side of the top fabric square.
- Place the squares RST with the marked square on top. Stitch 1/4in on both sides of the marked line.
3. Cut down the marked line to make two new squares.
4. Open the blocks outward.
5. Press seam (both layers) toward the darker color.
6. Place a ruler over the block keeping the 45 degree diagonal line over the diagonal seam. Trim to you r square to desired size. . There will now be two Half Square Triangles (HSTs).