# Which type of transformation does not preserve congruence?

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## Which transformation does not preserve?

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

## Which of the following transformation does not preserve orientation?

Opposite Isometry – A transformation that DOES NOT preserve orientation, the order of the lettering (ABCD) is reversed, either clockwise or counterclockwise becomes clockwise (the shapes are congruent). transformations from right to left ← (backwards).

## Which type of transformation does not always preserve size?

Dilation: A dilation is type of transformation which changes the size of a figure. It can become larger or smaller, but the shape of the figure does not change . So, in this transformation, dimensions of the figure are not preserved.

## What are the three transformations that preserve congruence?

There are three main types of congruence transformations:

• Translation (a slide)
• Rotation (a turn)
• Reflection (a flip)

## What is not preserve congruence?

A translation is considered a “direct isometry” because it not only maintains congruence, but it also, unlike reflections and rotations, preserves its orientation. On the other hand, a dilation is not an isometry because its Image is not congruent with its Pre-Image.

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## What transformation does not change its orientation but is not congruent?

In a reflection, the shape is simply reflected across a line of reflection. It does not change size or shape, so therefore it is a congruence transformation. It does change size, so therefore it is not a congruence transformation. The transformation that is not a congruence transformation is a DILATION.

## Which of the following is not a congruence transformation?

The only choice that involves changing the size of a figure is letter a) dilation and as a result, creates two figures that are NOT congruent. The other three choices merely “move” a shape to a new location (i.e. rotated, translated, or reflected) and result in a congruent figure.

## What is the only transformation that does not preserve rigid motion?

Rigid motion means form of motion that maintains distance. So the above mentioned forms – reflection, rotation and translation are part of rigid motion. Dilation is non rigid motion.

## Which of the following is not a rigid transformation?

Types of transformations Translation, reflection, and rotation are all rigid transformations, while dilation is a non-rigid transformation.

## Which transformations do not change the size of a figure?

There are three kinds of isometric transformations of 2 -dimensional shapes: translations, rotations, and reflections. ( Isometric means that the transformation doesn’t change the size or shape of the figure.)