How to Sign "Triangle"

Form both hands into '1' handshapes with your index fingers extended. Start with the tips of your index fingers touching in front of your chest. Move them diagonally downward and outward, then bring them straight across to meet again, drawing the shape of a triangle in the air.

Examples Using "Triangle" in a Sentence

1

Draw a triangle on the paper.

To sign this, you would sign 'draw', then trace the 'triangle' shape clearly in the air, and finish with the sign for 'paper'.

2

The yield sign is a triangle.

Establish the context by signing 'yield' and 'sign', then use your index fingers to draw the 'triangle' to describe its physical shape.

3

I need three triangles for this puzzle.

Sign 'three', then sign 'triangle' by tracing the shape, and follow up with the signs for 'need' and 'puzzle'.

How to Sign "Triangle"
Form both hands into '1' handshapes with your index fingers extended. Start with the tips of your index fingers touching in front of your chest. Move them diagonally downward and outward, then bring them straight across to meet again, drawing the shape of a triangle in the air.
Visual Logic(Etymology)
The sign for 'triangle' is a perfect example of an iconic sign in American Sign Language, meaning the physical movement directly mimics the visual appearance of the concept. By using your index fingers to trace three connected lines in the space in front of you, you are literally drawing the geometric shape of a triangle. This visual logic makes the sign incredibly intuitive and easy for beginners to remember.
Signing Tips
When signing 'triangle,' keep your movements sharp and distinct to clearly outline the three sides of the geometric shape. Make sure your index fingers touch at both the top point and the bottom center to complete the shape fully. Using crisp, straight lines rather than lazy curves ensures the person you are signing with immediately recognizes the specific shape you are referring to.
Common Mistakes
A frequent mistake beginners make is curving the bottom line instead of drawing it straight across, which can make the shape look more like a cone or a teardrop. Another common error is using a different handshape, such as the whole hand, instead of isolating just the index fingers. Always ensure your index fingers meet cleanly at the end to close the shape.
Regional Variations
This sign is widely used and understood across the ASL community with minimal regional variation.
Examples Using "Triangle" in a Sentence
1

Draw a triangle on the paper.

To sign this, you would sign 'draw', then trace the 'triangle' shape clearly in the air, and finish with the sign for 'paper'.

2

The yield sign is a triangle.

Establish the context by signing 'yield' and 'sign', then use your index fingers to draw the 'triangle' to describe its physical shape.

3

I need three triangles for this puzzle.

Sign 'three', then sign 'triangle' by tracing the shape, and follow up with the signs for 'need' and 'puzzle'.

Frequently Asked Questions
Can I draw the triangle with just one hand?

While you might occasionally see someone trace a shape with one hand in very casual, fast-paced conversation, the standard and clearest way to sign 'triangle' is symmetrically using both index fingers.

Does the size of the triangle I draw matter?

Yes! You can adjust the size of your movements to show whether you are talking about a massive triangle or a tiny one. The sign scales naturally to describe the object's actual size.

How do I sign other basic shapes?

Most basic geometric shapes in ASL, like squares, rectangles, or circles, are signed using the exact same principle: tracing the outline of the shape in the air with both of your index fingers.

ASL is a beautiful, expressive language. Practice regularly and have fun!