Reflection Symmetry with Flags
Find lines of symmetry in fifteen flag designs, then create designs with vertical and horizontal symmetry.
- Grades
- Grades 3–5
- Pages
- 2
- File type
- Subject
- Geometry, Math
- Resource types
- Activities
- Ontario expectations
- E1.1 — sort
From the author
About this resource
Explore reflection symmetry with fifteen pictured flags, then design flags in two spaces with vertical and horizontal guide lines. This two-page PDF activity supports identifying symmetry and constructing a design with a specified symmetry line.
Compare colours, shapes and small details on both sides of each proposed line. No PowerPoint presentation is included in the supplied download.
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In the classroom
Teaching tips & learning objectives
Learning objectives
- Test a design for reflection symmetry
- Draw supported lines of symmetry
- Create a flag design with a specified symmetry line
Teaching tips
- Trace a possible dividing line through each flag before comparing the two sides.
- Use the stripes and central shapes as reference points when testing whether the halves match.
Skills covered
- Symmetry recognition — students inspect flags for matching halves.
- Geometric comparison — stripes and shapes are compared across a dividing line.
- Visual reasoning — students judge whether a design remains balanced under reflection.
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Ontario curriculum
Ontario curriculum expectations
Ontario expectations
Ontario expectations
- E1.1 — sort and identify two-dimensional shapes by comparing number of sides, side lengths, angles , and number of lines of symmetry
Core concepts
Core concepts
- Line symmetry
- Reflection
- Flag design
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