Détection de Symétrie

Apprendre

Identifier les axes de symétrie dans les motifs et les formes.

Symmetry detection involves finding lines across which a pattern can be folded to match itself. Vertical symmetry means left matches right; horizontal symmetry means top matches bottom. Some patterns have both axes of symmetry, while others have none.

is_symmetric = (pattern == reflect(pattern, axis))

• Human face: approximately vertical symmetry
• Capital H: both vertical and horizontal symmetry
• Letter R: no symmetry
• Circle: infinite lines of symmetry

Comment le reconnaître

• Draw imaginary line down the center (vertical) or across (horizontal)
• Check if elements on one side mirror elements on the other
• For vertical: compare left and right columns
• For horizontal: compare top and bottom rows

Erreurs fréquentes

• Confusing vertical and horizontal axes
• Missing that colors must also match for symmetry
• Not checking all cells when pattern is complex
• Assuming diagonal symmetry when only vertical/horizontal asked

Conseils de pratique

Raisonnement Spatial