Lesson Plan

Lines of Symmetry for Quadrilaterals

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This Lines of Symmetry for Quadrilaterals lesson plan also includes:

Explore how lines of symmetry help define different categories of quadrilaterals. Looking at a square, rectangle, trapezoid, and parallelogram, young mathematicians discover that each shape has its own, unique symmetry. Encourage your class to look for patterns between the angles and side lengths of each shape and the lines of symmetry they found. A great resource for developing a deeper understanding of quadrilaterals.

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CCSS: Designed
  • Symmetry activity develops visualization skills
  • Side lengths are labeled to reinforce the definitions of different quadrilaterals
  • Shapes need to be enlarged if providing cut outs for folding lines of symmetry
  • Requires prior knowledge about symmetry and quadrilateral classification
Common Core