line of symmetry
Plural
lines of symmetry
1
a line that divides a shape into two congruent parts
- A circle has an infinite number of lines of symmetry because it can be divided into two equal halves along any diameter.
- The letter 'A' has one vertical line of symmetry that splits it into two identical halves.
- A square has four lines of symmetry: two along its diagonals and two along the midlines parallel to its sides.
- If a shape can be folded along a line and both halves match exactly, that line is called a line of symmetry.
- The butterfly's wings have a line of symmetry running along its body, making each wing a mirror image of the other.