The Math Meridian
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Lines of symmetry in polygons

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Learn it A line of symmetry splits a shape into mirror-image halves. A regular polygon with n sides has n lines of symmetry.

Example: How many lines of symmetry do a rectangle and a regular hexagon have?

  1. Rectangle (not a square): fold top-to-bottom and side-to-side → 2. The diagonals don't work.
  2. Regular hexagon: 6 sides → 6 lines.
  3. Rectangle 2, hexagon 6.

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