Triangle in a Square Quilt block design possibilities
Half square triangles are one of the most common quilt blocks used in modern and traditional quilting. They are versatile, beginner friendly, and easy to multiply across a quilt top. But sometimes, a quilter wants something a little different.
The triangle in a square quilt block offers an alternative to half square triangles. This block opens up a wide range of layout and design possibilities.
In this post, we will look at the design possibilities with this quilt block unit.

What Is a Triangle in a Square Quilt Block?
At its most basic, a triangle in a square quilt block features an isosceles triangle centered within a square. This unit can be used as a stand alone quilt block or as a building unit within a larger quilt design.

Design possibilities with the Triangle in a Square block
Tessellate the block and make a super scrappy quilt, pillow or table runner.

An alternate layout by reflecting the block to create a diamond pattern.

Star Block by combing the triangle unit with squares.

Possible quilt layout with is star block

Rotate the unit to create this star block design. This would make a great scrappy quilt.


Change the triangle to negative space to turn the background pieces into star points.


Use the unit in a house block.

Use the triangle in a square unit in a tree block.

As you can see, there are many design possibilities for the humble triangle in a square unit.
If you would like to make these blocks, you can purchase the foundation paper piecing templates in my shop, click here.
You may also like to read
Half Rectangle Triangle Quilt Block Designs
Foundation Paper Piecing Patterns for Beginners
Foundation Paper Piecing Frequently Asked Questions
Foundation Paper Piecing String blocks
