A line of symmetry is a line that divides a shape or object into two equal parts that are mirror images of each other. When folded along this line, the two halves match exactly, reflecting each other perfectly. This line is also called the axis of symmetry or mirror line because it acts like a mirror reflecting one half onto the other
. Lines of symmetry can be horizontal, vertical, or diagonal depending on their orientation. Different shapes have different numbers of lines of symmetry; for example, a square has four lines of symmetry (vertical, horizontal, and two diagonals), while a circle has infinitely many lines of symmetry passing through its center
. In summary, a line of symmetry:
- Divides a shape into two identical halves
- Creates mirror-image reflections on either side
- Can be in various orientations (horizontal, vertical, diagonal)
- Varies in number depending on the shape's symmetry properties
