How to Crochet a Triangle 3 Ways – Equilateral and Isosceles Triangle Patterns

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This is a free tutorial to learn how to crochet Triangles easily in 3 different ways. The tutorial has both step-by-step photos and a video tutorial.


Crocheting triangles is the foundation of shawls. But you can easily use this shape also for other projects like bags, amigurumi, and hats.

In this quick, but detailed tutorial, I’ll break down 3 different but easy ways to crochet triangles to make equilateral or isosceles triangles. You can easily substitute single crochet stitches, that was used for these patterns, for larger stitches. You will also learn how to make different other shapes.

Now, are you ready to learn these 3 different ways to crochet triangles?

3 Triangle Crochet Patterns Free

Crochet Geometry Shapes

Crocheting geometric shapes is not only fun but also very valuable when you want to create and design your own patterns. To make it easier, I already have a collection of different shapes including tips and tricks for them here:

Crochet Triangles – Video Tutorial

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How to: Crochet Triangles 3 Ways
– Photo Tutorial

Although there are more than 3 ways to crochet a triangle, I’ll be focusing only on the 3 easiest ways. You’ll learn how to a triangle in rows 2 ways, one being an isosceles triangle and the other one being an equilateral triangle. The third triangle is also an equilateral triangle but made in rounds from the center out.

Let’s grab your crochet hook – I used a 4.0mm Furls Crochet Hook – and your yarn – I used a worsted weighted yarn.

1. Isosceles Triangle Crocheted in Rows

For this triangle, you will decrease twice per row, one time at the beginning and one time at the end. It makes the triangle shrink very quickly.

Start with any even number of chains, such that the first round in single crochet stitches ends up being an odd number of stitches. Then follow the following pattern:

1 sc dec, 1 sc in each st until you have 2 sts left, 1 sc dec, turn

Repeat the above pattern until you have 3 sts left, decrease all 3 into one stitch to finish the triangle.

Crochet Triangle Pattern Tutorial

2. Equilateral Triangle Crocheted in Rows

For this triangle, you will decrease only once per row, either one time at the beginning or one time at the end. It makes the triangle shrink more slowly.

Start with any even number of chains, such that the first round in single crochet stitches ends up being an odd number of stitches. Then follow the following pattern:

1 sc dec, 1 sc in each st, turn

Repeat the above pattern until you have 2 sts left, decrease both into one stitch to finish the triangle.

Crochet Triangle Pattern Tutorial

3. Equilateral Triangle Crocheted in Rounds

This triangle might be the most popular of the three, cause you can expand the pattern to be as large as you like without having to be forced to start with a certain amount of chains in the beginning.

Start with a magic ring or alternative magic ring

R1: into the magic ring add: *1 sc, ch 2, repeat from * 2 more times, sl st to the first st

R2: *1 sc in each st, once you reach the chain space crochet [1 sc, ch 2, 1 sc], repeat from *

Repeat R2 until you reach the size you prefer for this equilateral triangle.

Crochet Triangle Pattern Tutorial

More Crochet Triangles

Although I only showed you how to crochet triangles 3 ways, there are more ways to do that. Just to mention a few other variations that I will add to this collection soon if I don’t have them yet:

  • Triangles are made in rows by increasing from only one stitch to infinity
  • Triangles made with 3 differently sized sides
  • Asymmetric triangles like the boomerang-shaped triangles -> Sunset Boomerang Scarf pattern
  • Isosceles Triangle made from rounds from the center of one side -> I used on in the Patchwork Project Bag
Crochet Triangle Pattern Tutorial

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You can have the most amazing pattern and yarn in the world, but if you don’t have the knowledge on how to crochet in a way that makes you proud, then all your work is for nothing.

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3 Triangle Crochet Patterns
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