Symmetry in Class 6 Maths (ICSE) deals with the concept of symmetry in various shapes and figures. Symmetry is the balance or proportionality in the arrangement of parts on opposite sides of a median or axis. In this topic, students learn about different types of symmetry, such as line symmetry (reflection symmetry) and rotational symmetry.

1. **Line Symmetry**: A figure has line symmetry if one half of the figure is a mirror image of the other half. The line along which the figure can be folded to achieve this mirror image is called the line of symmetry.

2. **Rotational Symmetry**: A figure has rotational symmetry if it looks the same after a certain amount of rotation (less than a full turn). The smallest angle of rotation that makes the figure look the same is called the angle of rotation.

3. **Types of Symmetry**: Figures can have multiple lines of symmetry or rotational symmetries, depending on their shapes. Some figures have both line and rotational symmetry.

4. **Examples**: Examples of symmetric figures include squares, rectangles, circles, and some irregular shapes that have a clear line of symmetry or rotational symmetry.

5. **Importance**: Understanding symmetry is important in art, design, and architecture. It helps in creating balanced and visually appealing compositions.

Overall, symmetry is an important concept in mathematics and has applications in various fields. Understanding symmetry helps in developing spatial reasoning skills and can be applied to solve problems in geometry and other areas of mathematics.