The Math Meridian
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Lines of symmetry

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Learn it A line of symmetry folds a shape into two halves that match exactly.

Example: How many lines of symmetry does a square have?

  1. Fold it down the middle (up and down): halves match. That's 1.
  2. Fold it across the middle: 2.
  3. Fold it along each diagonal: 3 and 4.
  4. A square has 4 lines of symmetry.

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