# Transformations: Definition and Types of Transformations: Rotation (For CBSE, ICSE, IAS, NET, NRA 2022)

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The geometric **transformation** is a bijection of a set that has a geometric structure by itself or another set. If a shape is transformed, its appearance is changed. After that, the shape could be congruent or similar to its preimage. There are basically four types of transformations:

- Rotation
- Translation
- Dilation
- Reflection

## Definition of Transformations

Transformations could be rigid (where the shape or size is not changed) and non-rigid (where the size is changed but the shape remains the same) . These are basic rules which are followed in this concept. To transform 2d shapes, it is an easy method.

The transformation can be categorized by the dimensions of the operand sets, distinguishing between planar transformations and spaces. They can also be classified on their properties.

After all the transformations, these shapes still have the same size, angles, lengths and area.

## Types of Transformations

When the size of a shape is increased or reduced then the image of the shape will be similar to the pre-image. The similar figures have dimensions equal in proportion.

But in the case of congruent, the transformation of objects is done by using rotation, reflection or translation. The shape is turned or flipped to transform into another shape.

There are four major types of transformations namely:

- Rotation
- Translation
- Dilation
- Reflection

### Rotation

This type of transformation has an object about a fixed point without changing its size or shape.

Shape is rotated to form its image.

### Translation

This type of translation is defined as moving the object in space by keeping its size, shape or orientation constant. In a translation, each point of the shape must be moved in the same direction and for the same distance. When you are doing a translation, the primary object is called the pre-image, and the object after the translation is called the image.

### Dilation

This type of translation expands or contracts the object by keeping its orientation or shape same. This is also known as resizing.

### Reflection

This type of translation is called as it flips the object across a line by keeping its shape or size constant.

Example:

Draw the Rotation, translation, and reflection transformation of this given figure.

Solution:

Here given a figure,

We have to draw the different transformation.

**Translation**:

Translation is defined as moving the object in space by keeping its size, shape or orientation remain constant.

**Reflection**:

Reflection is called as it flips the object across a line by keeping its shape or size constant.

Rotation:

This type of transformation has an object about a fixed point without changing its size or shape.