Spiral Triangles

Did you know?
An equilateral triangle has three equal sides and three equal angles. The angles are all 60 degrees. The height of an equilateral triangle is the distance from a corner to the middle of the opposite side.


Make a triangle spiral


  • Paper, 2 colors
  • Protractor
  • Ruler
  • Pencil
  • Scissors
  • Glue

Begin with a large equilateral triangle. Next, measure the height of the triangle.

On a second color of paper, draw and cut out a triangle with the sides the same length as the height of the first triangle. Paste the side of the triangle along the height line of the larger triangle, so it covers half of the large triangle. Keep on creating smaller triangles, in alternating colors, with sides that match the previous triangle’s height to create a spiral!


Can this be done with other types of triangles? (Hint: look up Pythagorean Spiral)

From: https://www.weareteachers.com/10-geometric-art-explorations/


This program has been designed for you to share with your child. Read the material together, ask questions and encourage your child to ask questions. Then nurture their curious mind by doing the activities with them. Books included are available via CPL’s digital library (with a library card).