Definitions [3]
Symmetry means that one half of an object is an exact mirror image of the other half. If you could fold the object and both halves match perfectly, then it has symmetry.
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Mirror line mm′ = Line of Symmetry
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Object (F) and its image (F′) are equal distances from the line
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When folded along this line, both parts match exactly
A line of symmetry is an imaginary line that divides a shape into two identical halves. Each half is the mirror image of the other.
Some shapes, like a square, have more than one line of symmetry.
A symmetric point is a matching point on the opposite side of a line such that both points are equally far from the line, and the line acts as a perfect mirror between them.
- The mirror line divides a figure into two equal halves that are mirror images of each other.
Example:
When folded along AB, points P and Q coincide — showing that Q is the symmetric point of P about AB.
