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Exploring Triangles

Exploring Triangles

Students will explore the geometry of triangles and create a 3-D poster to display what they've learned.

Lesson Plan

Supplies Needed

Gather all the supplies needed to bring your craft ideas to life! From paints and markers to glue and scissors, our crafts section has everything to spark creativity and make every project truly special.

  • Poster Board
  • Ruler

Steps

  • Step 1

    Define the different kinds of triangles with students: equilateral, isosceles, scalene, acute, right, and obtuse. Ask them to think of examples of triangle-like objects they see in real life, perhaps an open ladder, a wedge of cheese, a yield sign on the road, a recycling icon, etc.

  • Step 2

    Start by having students create patterns on plain paper and then share those colorful sheets with classmates. Use the hand-decorated paper to cut out various types of triangles.

  • Step 3

    Ask students glue their triangles onto a sheet of poster paper, label each type of triangle, and write captions that describe the characteristics.

Standards

MATH: Create models that demonstrate math concepts and attend to precision.

MATH: Analyze, compare, create, and compose math ideas using written, oral, and drawn lines, shapes, forms, and patterns.

MATH: Draw points, lines, line segments, rays, angles (right, acute, obtuse), and perpendicular and parallel lines. Identify these in two-dimensional figures.

Adaptations

Have students draw and cut out colorful triangle shapes and then create a mosaic collage using the cut-outs.

Challenge students to draw an image using only triangles. For example a fox might have a triangle for a head, smaller triangles for the nose and ears, two triangles put together to create eyes, thin slivery triangles for whiskers, etc.