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- A 2D shape is symmetrical if a line can be drawn through it and either side is a reflection of the other. You would call this the line of symmetry. If you put a mirror on this line, you would see the whole shape in the reflection. That’s why a line of symmetry is sometimes called the mirror line.
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Here you will learn about lines of symmetry, including symmetry properties within polygons, angle properties, and symmetry of different line graphs. Students first learn about line symmetry in grade 4 with their work with 2D shapes in geometry.
- Vertical Line of Symmetry
- Horizontal Line of Symmetry
- Diagonal Line of Symmetry
It is an imaginary vertical line that goes from top to bottom (or vice-versa) in an object and divides it into right and left mirror halves. For example, a club shape has a vertical line of symmetry.
It is an imaginary horizontal line that goes from right to left (or vice-versa) in an object and divides it into top and bottom mirror halves. For example, an arrow has a horizontal line of symmetry.
It is an imaginary diagonal or skew line that goes slanting in an object and divides it into mirror halves, as in the case of a square.
A line of symmetry is the line that divides a shape or an object into two identical parts. Let's learn the definition, types, solved examples and more.
The imaginary line or axis along which you fold a figure to obtain the symmetrical halves is called the line of symmetry. It basically divides an object into two mirror-image halves. The line of symmetry can be vertical, horizontal or diagonal. There may be one or more lines of symmetry.
- 3 min
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Here we will learn about lines of symmetry, including symmetry properties within polygons, angle properties, and symmetry of different line graphs. There are also lines of symmetry worksheets based on Edexcel, AQA and OCR exam questions, along with further guidance on where to go next if you’re still stuck.
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Learn about the different types of symmetry: Reflection Symmetry (sometimes called Line Symmetry or Mirror Symmetry), Rotational Symmetry and Point Symmetry.
