A congruence transformation is a transformation that doesn’t change the size or shape of an object. There are three main types of congruence transformations, and those are reflections (flips), rotations (turns), and translations (slides).

If a figure is enlarged or reduced and retains its shape, then it is said to be **dilated**. Note that the stretching (or shrinking) of a shape is called a **dilation**. It is clear that **dilation** is not a **congruent transformation**, because the size of the shape is changed.

Furthermore, what type of transformation always results in congruent figures? **Rotations**, **reflections**, and **translations** are isometric. That means that these transformations do not change the size of the figure. If the size and shape of the figure is not changed, then the figures are congruent.

Consequently, does a translation preserve congruence?

A **translation** is a specific type of transformation, or change, in an original figure, in which an image is formed by moving every point on a figure the same distance in the same direction. A **translation preserves congruence** and orientation so that any point that is not moved correctly **will** change the figure’s shape.

What are the 4 types of transformations?

There are four main types of transformations: **translation**, **rotation**, **reflection** and dilation.

### What are the three congruence transformations?

A congruence transformation is a transformation that doesn’t change the size or shape of an object. There are three main types of congruence transformations, and those are reflections (flips), rotations (turns), and translations (slides).

### How do you dilate a transformation?

Starting with ΔABC, draw the dilation image of the triangle with a center at the origin and a scale factor of two. Notice that every coordinate of the original triangle has been multiplied by the scale factor (x2). Dilations involve multiplication! Dilation with scale factor 2, multiply by 2.

### What is the rule of dilation?

A dilation is a transformation that produces an image that is the same shape as the original, but is a different size. If the scale factor is greater than 1, the image is an enlargement (a stretch). • If the scale factor is between 0 and 1, the image is a reduction (a shrink).

### What is center of dilation?

The center of a dilation is a fixed point in the plane about which all points are expanded or contracted. The center is the only invariant (not changing) point under a dilation (k ≠1), and may be located inside, outside, or on a figure.

### Is Dilation a similarity transformation?

A similarity transformation is one or more rigid transformations (reflection, rotation, translation) followed by a dilation. In other words, two figures are similar if a similarity transformation will carry the first figure to the second figure.

### What does it mean to be congruent?

Congruent. Angles are congruent when they are the same size (in degrees or radians). Sides are congruent when they are the same length.

### What is the rule for translation?

In a translation, every point of the object must be moved in the same direction and for the same distance. When you are performing a translation, the initial object is called the pre-image, and the object after the translation is called the image.

### Does a reflection preserve congruence?

Transformations include rotations, reflections, translations, and dilations. Students must understand that rotations, reflections, and translations preserve congruence but dilations do not unless the scale factor is one.

### How can you tell if two figures are congruent?

Two polygons are congruent if they are the same size and shape – that is, if their corresponding angles and sides are equal. Move your mouse cursor over the parts of each figure on the left to see the corresponding parts of the congruent figure on the right.

### What is the difference between transformation and translation in math?

Translation is when we slide a figure in any direction. Reflection is when we flip a figure over a line. Rotation is when we rotate a figure a certain degree around a point. Dilation is when we enlarge or reduce a figure.

### What is a translation transformation?

In Euclidean geometry, a translation is a geometric transformation that moves every point of a figure or a space by the same distance in a given direction. In Euclidean geometry a transformation is a one-to-one correspondence between two sets of points or a mapping from one plane to another.