Midterm Review: Chapter 4

Front

What is the result of rotating a figure 90 degrees clockwise?

Back

The figure is turned 90 degrees in the clockwise direction around a point, typically the origin.

Front

What transformations keep figures congruent?

Back

Translation, reflection, and rotation.

Front

What does it mean for two triangles to be similar?

Back

Two triangles are similar if one can be obtained from the other by dilation (scaling) and possibly rotation or reflection.

Front

What type of transformation is a reflection?

Back

A reflection is a transformation that flips a figure over a line, creating a mirror image.

Front

What is the line of reflection for a figure reflected across the line x = -2?

Back

The line of reflection is the vertical line x = -2.

Front

How do you determine the scale factor in dilation?

Back

The scale factor is the ratio of the lengths of corresponding sides of the original figure to the dilated figure.

Front

What is the difference between rotation and reflection?

Back

Rotation turns a figure around a point, while reflection flips it over a line.

Front

What is a translation in geometry?

Back

A translation moves every point of a figure the same distance in the same direction.

Front

What is the effect of a 180-degree rotation on a figure?

Back

A 180-degree rotation turns the figure upside down.

Front

What does it mean for a transformation to be rigid?

Back

A rigid transformation preserves the shape and size of a figure.