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Line Symmetry
See It in Action
Two examples of the idea done right—and one common look-alike that is not right.
EXAMPLE
EXAMPLE
NON-EXAMPLE
Definition
Line symmetry (also called reflectional symmetry) means a figure can be folded along a line so that both halves match exactly.
Key Points:
A figure has line symmetry if there is at least one line of symmetry.
That line divides the figure into two congruent mirror-image parts.
The line of symmetry acts like a mirror.
Example:
A heart shape has line symmetry if you draw a vertical line down the middle — both sides match when folded over that line.
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