Transformation

Front

What are congruence transformations?

Back

Transformations that preserve the shape and size of a figure. Examples include rotations, translations, and reflections.

Front

List the three types of congruence transformations.

Back

Rotations, Translations, Reflections.

Front

What is the result of reflecting a point (x, y) across the x-axis?

Back

The new coordinates will be (x, -y).

Front

What is the result of reflecting a point (x, y) across the y-axis?

Back

The new coordinates will be (-x, y).

Front

What happens to the coordinates of a point (x, y) when it is rotated 90° counterclockwise about the origin?

Back

The new coordinates will be (-y, x).

Front

What happens to the coordinates of a point (x, y) when it is rotated 180° about the origin?

Back

The new coordinates will be (-x, -y).

Front

What happens to the coordinates of a point (x, y) when it is rotated 270° counterclockwise about the origin?

Back

The new coordinates will be (y, -x).

Front

If triangle GHI is reflected across the x-axis, what happens to the y-coordinates of its vertices?

Back

The y-coordinates of the vertices will change sign.

Front

What is the angle of rotation for a full rotation?

Back

360°.

Front

What is the sequence of transformations for reflecting over the y-axis and then the x-axis?

Back

Reflect over the y-axis, then reflect over the x-axis.