Exploring Triangles

Exploring Triangles lesson plan

Students display their geometry genius by creating a poster of popping triangles.

  • 1.

    Students find out about different kinds of triangles, including right, isosceles, scalene, and equilateral triangles. Identify characteristics of each triangle.

  • 2.

    Use a ruler and Crayola® Colored Pencils to make samples of each kind of triangle. Decorate triangles with colorful patterns, then cut out with Crayola Scissors.

  • 3.

    Cut and fold small strips of paper in fourths to make tabs to attach to the backs of each triangle. Glue one end to the other with a Crayola Glue Stick. Apply glue to the outward faces of the tabs to attach triangles on poster board.

  • 4.

    Use colored pencils to label each triangle on the poster board. Add descriptive captions identifying characteristics of each triangle. Draw arrows pointing out particular angles typical of specific triangles. Design a title for the poster using block lettering and bold colors.


  • LA: Acquire and use accurately grade-appropriate general academic and domain-specific words and phrases, including those that signal precise actions, emotions, or states of being and that are basic to a particular topic.
  • MATH: Classify two-dimensional figures based on the presence or absence of parallel or perpendicular lines, or the presence or absence of angles of a specified size. Recognize right triangles as a category, and identify right triangles.
  • VA: Use different media, techniques, and processes to communicate ideas, experiences, and stories.
  • VA: Use visual structures of art to communicate ideas.


  • Students draw a template of a specific triangle type and use the template to create an original tesselation from this template.
  • Students search for samples of each type of triangle at home and in their neighborhood. Create a small gropu or whole class chart of triangle types and where they were observed by students.