Respuesta :

sqdancefan

Answer:

"A line"

Step-by-step explanation:

A line of symmetry is a line that divides an object into two congruent halves.

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However, not every line that does so is a line of symmetry. The vertical line in the attached diagram divides both figures into congruent halves. It is only a line of symmetry for the green figure.

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altavistard

Answer:

Axis of symmetry

Step-by-step explanation:

That's the "axis of symmetry."  It's most often associated with parabolas.

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