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Learn how to identify line symmetry in irregular polygons through folding techniques. This lesson covers common misconceptions and provides examples of polygons with no lines of symmetry, as well as those with horizontal, vertical, and diagonal lines of symmetry.
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How many lines of symmetry does this polygon have?
A Common Misunderstanding Line Symmetry
A Common Misunderstanding Regular 4 congruent sides means 4 lines of symmetry Irregular Opposite sides are congruent – will not have 4 lines of symmetry
Core Lesson The arrow does not have a vertical line of symmetry.
Core Lesson The arrow does not have a diagonal line of symmetry.
Core Lesson This lightning bolt has NO lines of symmetry.
Core Lesson The trapezoid does not have a horizontal line of symmetry.
Core Lesson This trapezoid has 1 vertical line of symmetry.