A connecting-the-dots activity seems too easy for seventh grade but connecting vertices may prove a challenge. Class members first examine a figure created by drawing squares around the inside of an octagon and connecting the vertices. they then determine lines of symmetry and the measures of specified angles in the figure.

Concepts

octagons, lines of symmetry, angle measurement

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Additional Tags

math

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Instructional Ideas

• Use the task as an assessment question

Classroom Considerations

• Note that the task uses British spellings
• Learners need to be able to find angle measurements, determine lines of symmetry, and identify octagons

Pros

• Well-drawn diagrams are great for visual learners
• Includes solutions to the task

Cons

• Rubric contains unexplained abbreviations

Common Core

7.G.A.2 7.G.B.5 MP2 MP3 MP6 MP7