Pattern Block Triangles

Math concepts: Addition, counting, geometry
Equipment: Pattern blocks, scratch paper and pencil
Common Core: K.CC.4, K.CC.5, K.OA.1, K.OA.2, 1.OA.1, 1.OA.2, , 1.OA.4, 1.OA.5, 1.G.2, 2.OA.1, MP1, MP2, MP6, MP7, MP8

How many blocks you can use to build a triangle from pattern blocks?

This beautiful lesson combines student creative work, counting and addition practice, combining geometric shapes, and a slow build from easier to more challenging work.

You can try it online with this new Polypad embed from Mathigon. Just use the four blocks pictured below to build triangles.
Here’s a triangle I built with 5 blocks.

This beautiful lesson combines student creative work, counting and addition practice, combining geometric shapes, and a slow build from easier to more challenging work.

Download the PDF
– To learn more about this lesson.