Bias Rectangles (HRTs) Resources

I have an idea to spice up the latest batch of 16 patch blocks I made for the BAMQG charity project using HRTs.

HRTs are half rectangle triangles, which are similar to half square triangles. This shape/block is also called a Bias Rectangle. I wanted to make them using a method similar to the Triangle Technique. Wouldn’t that be great? DH and SIL worked on the math, but they could only get one rectangle and a kite shape out of a similar method.


I went looking for tutorials.

Adrianne of and Little Bluebell blog uses one part of the Tri-Recs ruler. She shows a top in the post that she made and details how the ruler works. If you are doing Bonnie Hunter’s 2016 mystery quilt, you need this ruler set anyway. You can buy it for the mystery quilt and have it for HRTs.

It might be easier to cut these shapes if you had a cutting mat turntable. Martelli has one that includes an ironing surface.

The Modern Quilt Guild posted a tutorial on bias rectangles. The tutorial shows how to make 4.5 x 6.5 inch final block size, but notes that the tutorial works for any size as long as you use the same sized rectangles. The tutorial includes directions for “squaring” up the blocks (a rectangle made up of two triangles).

Wayne Kollinger also posted 3 (yes, THREE) different tutorials for making HRTs. First, he talks about just cutting fabric. No tools or special rulers. Wayne’s second method also uses the Tri Recs ruler. The third tutorial uses freezer paper. One thing Wayne says is “the rectangles are twice as long as they are wide. This means that for a 6″x6″ block the rectangles would have a finished size of 2″x 4″. For a 9″x9″ block the rectangles would have a finished size of 3″x6″.”, which is very helpful information moving forward.

Heidi at Buttons and Butterflies posted a tutorial includes what not to do, which is a great illustration of what I found out from DH’s mathematical adventures. From the tutorial you can see what happens without having to do it yourself. 😉 There are a few different techniques included in this post including an Accuquilt technique. The Accuquilt die has the tips cut off for easier matching of patches. She finishes up with a tutorial similar to the Modern Quilt Guild tutorial. Heidi also talks about the differences in HRTs, which I was glad about since I didn’t realize some of the things she discusses.

Kristi of the Schnitzel and Boo Blog uses a similar technique to Heidi, but sews on each side of the center line to make her HRTs in her post. The post includes a quilt tutorial/pattern as well.

Marjorie Rhine from Quilt Woman has a PDF discussthe topic, including three options for making the blocks. One is to use a template, similar to my tutorial on using templates. I supposed the Tri Recs ruler discussed above would also work. Also mentioned are the Marti Michell’s Template Set D or Margaret Miller’s AnglePlay Template. The latter is a companion to a couple of books. She includes paper piecing and using templates as techniques. The PDF includes a lot of useful information.

These can also be made using foundation piecing. Printing a template from EQ7 or drawing the paper template is also possible.

BiRangle ruler
BiRangle ruler

Finally, I have a ruler called a BiRangle ruler. It is by Martingale (I bought it when the company was called That Patchwork Place).

Sew Mama Sew has a tablerunner pattern. She talks about why the Triangle Technique does not work for HRTs.


Author: JayeL

Quiltmaker who enjoys writing and frozen chocolate covered bananas.

6 thoughts on “Bias Rectangles (HRTs) Resources”

  1. great info… question: is it a typo in the paragraph about modern quilt guild tutorial…

    …“squaring” up the blocks (a rectangle made up of two rectangles).

    did you mean two triangles?


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