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Lesson Plan

5. Explore additive angles with pattern blocks (FP)

teaches Common Core State Standards 111.6.7.E
teaches Common Core State Standards MAFS.4.MD.3.7
teaches Common Core State Standards CCSS.Math.Content.4.MD.C.7
teaches Common Core State Standards CCSS.Math.Practice.MP4
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Lesson objective: Compose and decompose angles.

This lesson helps to build fluency with composing and decomposing angles. Pattern blocks are used here because it highlights the composition of a cirlce with multiple angles.  This work develops students' understanding that angles can be composed and decomposed.

Students engage in Mathematical Practice 4 (model with mathematics) as they use pattern blocks to decompose angles by starting off with concrete examples. Students see that the measures of all of the angles at a point, with no overlaps or gaps, add up to 360°, and they use this fact to find the measure of the pattern blocks’ angles. 

Key vocabulary:

  • acute
  • angle
  • compose
  • decompose
  • degrees
  • obtuse
  • right
  • straight angle

Special materials needed:

  • pattern blocks 
Related content

Appears in

Recognizing and analyzing attributes of 2-dimensional shapes

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