Symmetry

Start with a simple definition of symmetry — “an image that is the same on both sides” — and let a more precise understanding (matching parts equidistant from a line of symmetry) form as students work.

Completed examples of the three symmetry types should be hung at the front of the room, alongside their uncolored sheets, so the teacher can summarize the differences.

Materials

• Symmetry sheets, pages 106–108 (1 of each type per student)
• Markers (1 box per student)
• The completed project, prepared by the teacher before the lesson

This is a lesson preview. The complete lesson — with step-by-step diagrams, a reproducible assessment, and the blackline masters — is in the Math Art book.