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A figure has line symmetry (also known as reflexive symmetry) if it can be divided into two equal parts. Each part is the mirror image of the other. Some figures do not have a line of symmetry. Some have only one and others have two or more. A line of symmetry can be vertical or horizontal. A figure can have two congruent parts but no line of symmetry. A line segment’s midpoint bisects the segment into two shorter segments of equal length.
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