# Symmetry Class 7 Maths Formulas

For those looking for help on Symmetry Class 7 Math Concepts can find all of them here provided in a comprehensive manner. To make it easy for you we have jotted the Class 7 Symmetry Maths Formulae List all at one place. You can find Formulas for all the topics lying within the Symmetry Class 7 Symmetry in detail and get a good grip on them. Revise the entire concepts in a smart way taking help of the Maths Formulas for Class 7 Symmetry.

## Maths Formulas for Class 7 Symmetry

The List of Important Formulas for Class 7 Symmetry is provided on this page. We have everything covered right from basic to advanced concepts in Symmetry. Make the most out of the Maths Formulas for Class 7 prepared by subject experts and take your preparation to the next level. Access the Formula Sheet of Symmetry Class 7 covering numerous concepts and use them to solve your Problems effortlessly.

Lines of Symmetry for Regular Polygons
Regular polygons have equal sides and equal angles. They have multiple (i.e., more than one) lines of symmetry. Each regular polygon has as many lines of symmetry as it has sides.

 Regular Polygon Regular Hexagon Regular Pentagon Square Equilateral Triangle Number of Lines of Symmetry 6 5 4 3

Rotational Symmetry
Rotation, like the movement of the hands of a clock, is called a clockwise rotation; otherwise, it is said to be anticlockwise.

When an object rotates, its shape and size do not change. The rotation turns an object about a fixed point. This fixed point is called the centre of rotation. The angle by which the object rotates is called the angle of rotation.

A half-turn means rotation by 180°; a quarter-turn means rotation by 90°.

Rotation may be clockwise or anticlockwise.

If, after a rotation, an object looks exactly the same, we say that it has rotational symmetry.

In a complete turn (of 360°), the number of times an object looks exactly the same is called the order of rotational symmetry. For example, the order of symmetry of a square is 4 while, for an equilateral triangle, it is 3.

Line Symmetry and Rotational Symmetry
Some shapes have only one line of symmetry, like the letter E;

Some have only rotational symmetry, like the letter S;

and some have both symmetries like the letter H.

The study of symmetry is important because of its frequent use in day-to-day life and more because of the beautiful designs it can provide us.

A figure is said to be symmetrical about a line l if it is identical on either side of l. In the adjoining figure, / is the line of symmetry or axis of symmetry.

Regular polygons have equal sides and equal angles. They have multiple (i.e. more than one) lines of symmetry.

Each regular polygon has as many lines of symmetry as it has sides.

Lines of Symmetry of some Irregular Polygons.

Each of the following capital letters of the English alphabet is symmetrical about the dotted line or lines as shown:

A figure is said to have rotational symmetry if, after a rotation, an object looks exactly the same.

The fixed point, about which the rotation turns an object (not changing its shape and size) is called centre of rotation.

In a complete turn (of 360°), the number of times an object looks exactly the same is called the order of rotational symmetry.