Rigid Motions

Front

What is a rigid motion?

Back

A transformation that preserves distance and angle measures, meaning the shape and size of the figure remain unchanged.

Front

What is a reflection in geometry?

Back

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

Front

What is the pre-image in a transformation?

Back

The original figure before any transformation is applied.

Front

What is the image in a transformation?

Back

The resulting figure after a transformation has been applied to the pre-image.

Front

What does it mean to rotate a point around the origin?

Back

To turn the point around the origin (0,0) by a specified angle.

Front

What is the result of rotating the point (x, y) 90 degrees clockwise around the origin?

Back

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

Front

What is the result of rotating the point (x, y) 90 degrees counterclockwise around the origin?

Back

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

Front

What is the term for a transformation that slides a figure without changing its size or shape?

Back

Translation.

Front

What is the term for a transformation that enlarges or reduces a figure?

Back

Dilation.

Front

What is the relationship between reflections and symmetry?

Back

Reflections create symmetry; a figure and its reflection are symmetric with respect to the line of reflection.