# What is preserved in a dilation

## What remains the same in a dilation?

A dilation is a transformation that produces an image that is the same shape as the original, but is a different size. … After a dilation,

**the pre-image and image have the same shape but not**the same size. Sides: In a dilation, the sides of the pre-image and the corresponding sides of the image are proportional.## Do dilations preserve position?

Reflection does not preserve orientation. Dilation (scaling), rotation and translation (shift)

**do preserve it**.## Which of the following properties is preserved after a dilation of a figure?

The following properties are preserved between the pre-image and its image when dilating:

**Angle measure**(angles stay the same) Parallelism (things that were parallel are still parallel) Collinearity (points on a line, remain on the line)## Does a dilation preserve length?

**Dilations do not preserve distance**(side lengths) while rigid motions do.

## What do dilations not preserve?

Dilations preserve angle measure, betweenness of points and collinearity. It does

**not preserve distance**.## Does a dilation preserve congruence?

Students must understand that

**rotations, reflections, and translations preserve congruence**but dilations do not unless the scale factor is one.## What do rotations preserve?

angles

Rotation

**preserves the orientation**. For example, if a polygon is traversed clockwise, its rotated image is likewise traversed clockwise. Rotation is isometry: a rotation preserves distances. Rotation preserves angles.## Do dilations preserve parallel lines?

When you dilate a line segment,

**the original line segment will always be parallel to**(or on the same line as) the image.## What reflection preserves?

Reflection preserve

**the distance between two points**.## Do rotations preserve perimeter?

**If you have the same side lengths and the same angles, the perimeter and area are also going to be preserved**. Just like we saw with the rotation example. These are rigid transformations. These are the types of things that are preserved.

## What does length preserving mean?

n. 1. ( Mathematics)

**maths rigid motion of a plane or**space such that the distance between any two points before and after this motion is unaltered. 2. ( Physical Geography) equality of height above sea level.## How do you know if orientation is preserved?

## Is orientation preserved during dilation?

Dilations. A dilation is a transformation which preserves the

**shape and orientation**of the figure, but changes its size.## What properties does rotation preserve?

Rotations move lines to lines, rays to rays, segments to segments, angles to angles, and parallel lines to parallel lines, similar to translations and reflections. Rotations preserve

**lengths of segments and degrees of measures of angles similar to translations and reflections**.## Which properties of a figure are preserved after a rotation?

The properties of a figure that are preserved during rotation are

**distance,angle measures,parallelism,colinearity,midpoint and orientation**.## Why does dilation preserve orientation?

DILATIONS: ✓ Dilations are an enlargement / shrinking. ✓ Dilations multiply the distance from the point of projection (point of dilation) by the scale factor. ✓ Dilations are not isometric, and preserve orientation

**only if the scale factor is positive**.## Do rotations preserve or change the orientation of the vertices?

It is preserved during these transformations: translations, dilations, and

**rotations**. A change in the orientation of the vertices implies a change in the orientation of the figure. This definition is used in mathematics.## What does orientation mean in transformations?

Orientation: Orientation refers

**to the arrangement of points, relative to one another, after a transformation has occurred**. For example, the reference made to the direction traversed (clockwise or counterclockwise) when traveling around a geometric figure. (Also see the diagram shown under “Opposite Transformations”.)## Which of the following properties are preserved in a translation?

We found that translations have the following three properties:

**line segments are taken to line segments of the same length**; angles are taken to angles of the same measure; and. lines are taken to lines and parallel lines are taken to parallel lines.## What are the rules of transformations?

The function translation / transformation rules:

**f (x) + b shifts the function b units upward.****f (x) – b shifts the function b units downward**. f (x + b) shifts the function b units to the left.## What is preserved in math?

In mathematics, the word “preserve” usually means the

**“preservation of properties”**. Loosely speaking, whenever a mathematical construct A has some property P , after A is somehow “transformed” into A′ , the transformed object A′ also has property P .## What is preserved in a translation?

A translation (notation T

_{a}_{,}_{b}) is a transformation which “slides” a figure a fixed distance in a given direction. In a translation, ALL of the points move the same distance in the same direction. … Properties preserved under a translation from the pre-image to the image.## What stays the same after a translation?

A translation is when you “slide” an object from one place on the 2D plane to another. The translated object stays congruent and it stays in the same orientation (which is changed by rotation).

**All angles and side lengths stay the same**.## How does a translation change the preimage?

A translation is a transformation that

**slides a figure on the coordinate plane**without changing its shape, size, or orientation. In a rotation, the center of rotation is the point that does not move. The rest of the plane rotates around this fixed point.