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Line of Symmetry – Definition, Types and Examples


Symmetry is an important concept commonly exhibited in nature and is used almost in every field of life. This is a characteristic feature of many things in the world.

What is Line of Symmetry?

The line dividing the shape into two equal halves is called the line of symmetry.  In other words, A line about which a figure is folded so that the two parts of the figure will coincide is called the line of symmetry.

  • A Symmetrical figure looks the same on both sides of the line of symmetry.
  • Some figures can have one line of symmetry
  • Some figures have two or more lines of symmetry
  • And some figures have no lines of symmetry

Study the figure in which lines of symmetry are marked with dotted lines.

Line of Symmetry of Plane Shapes

Line of Symmetry

This is a line of symmetry of plane shapes.

Line of Symmetry in Square

The square have 4 lines of symmetry, shown in given figure:

Line of Symmetry in Square

Line of Symmetry Examples

Some of the examples of the line of symmetry for different figures are given below-

  • An equilateral triangle have 3 lines of symmetry
  • A circle have infinite lines of symmetry
  • Regular Pentagon:  five lines of symmetry
  • A Regular hexagon has six lines of symmetry

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