## Class 7 RS Aggarwal Chapter-18 Reflection and Rotational Symmetry Solutions - Solutions

## FAQs on RS Aggarwal Class 7 Solutions Chapter-18 Reflection and Rotational Symmetry

**1. What are the Types of Reflection?**

There are three divisions of reflection -

Regular Reflection or specular reflection

Diffused Reflection

Multiple Reflection

**2. What is Rotational Symmetry? explain with an example.**

A figure has rotational symmetry if the image agrees with the preimage when rotated by an angle between 0° and 360°. The number of times the figure coincides with itself as it rotates through 360 degrees is the order of symmetry. A regular hexagon, for example, has rotational symmetry. The property of an object to look identical following a complete or partial rotation is also known as rotation symmetry.

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**4. What is the difference between reflection and Rotational Symmetry?**

An object has reflectional Symmetry similar to alphabets that may be right/left (imagine putting a mirror on the vertical line dividing the letters), like the letters:

T,Y,U,A,V,M,W,

Or possible it can have reflectional Symmetry that may be up/down (imagine putting a mirror on the horizontal line dividing the letters) like the letters:,D,C,E,B,K

Or a letter may have both up and down and left/right reflectional symmetry. like the letters:X,O,H,I,.

Rotational symmetry is a type of symmetry in which you can envision turning an object, or a letter, fewer than 360 degrees and it will still match up. Rotational symmetry is shared by the four letters that have both left/right and up/down symmetry, as well as those letters that do not have reflectional symmetry, such as S and Z.

**5. What is the easiest way to solve symmetry ?**

You must first determine whether the equation is written in standard form or vertex form in order to calculate the line of symmetry algebraically. y = ax2 + bx + c is the standard form, where a, b, and c are all real numbers. To find the line of symmetry, apply the formula x = -b / 2a. Geometry, nature, and shapes are all based on symmetry. It generates patterns that assist us in conceptually organising our reality.