Large Equilateral Triangles Resource (Free Download)

Suitable for Year groups: 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11

Large Equilateral Triangles resource description

Here is a page of large equilateral triangles that could be cut out and used for a variety of mathematical lessons.

Large Equilateral Triangles

What is the resource?

This PDF provides sizable equilateral triangles (all sides equal) ready to print. Variations with blank interiors or dotted grids are offered.  Suitable for primary ages.


Why are equilateral triangles important?

These special triangles open up surprising maths explorations:

  • Tessellations: They tile neatly. This shows how simple shapes build patterns.
  • Strong structures: In design, triangles offer rigid support (think truss bridges).
  • Geometry basics: Each interior angle is 60°, offering early angle study.
  • 3D building blocks: Pyramids are based on triangles – toys demonstrate this link.


Why is this resource helpful?

It makes these concepts hands-on rather than just diagrams:

  • Physical manipulation: Kids build shapes, create patterns, and test how the triangles fit.
  • Supports different learners: The Gridded option assists with coordinate and symmetry work.
  • Open-ended use: Great for tessellation art, model making, exploring fractions...
  • Printable PDF: Teachers get as many big triangles as needed for activities.
  • Visualizes angles: Handling shapes makes the '60 degrees in each corner' real.

This resource builds spatial reasoning and a foundation for advanced geometry topics. It empowers kids to learn by doing.



Also, have a look at our wide range of worksheets that are specifically curated to help your students practice their skills related to similarity and congruence. These teaching resources and worksheets are in PDF format and can be downloaded easily.



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