Flashcard: Congruence Transformations

Front

What is a reflection in geometry?

Back

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

Front

What happens to the coordinates of a point when it is reflected over the y-axis?

Back

The x-coordinate changes sign, while the y-coordinate remains the same.

Front

What is the result of reflecting the point (-5, 2) over the y-axis?

Back

The new point is (5, 2).

Front

What is a rotation in geometry?

Back

A rotation is a transformation that turns a figure around a fixed point, called the center of rotation.

Front

How many degrees do you need to rotate a figure to return it to its original position?

Back

You need to rotate it 360 degrees.

Front

What is the term for the original figure before a transformation?

Back

The original figure is called the Pre-Image.

Front

What is the term for the figure after a transformation?

Back

The figure after a transformation is called the Image.

Front

What is a translation in geometry?

Back

A translation is a transformation that slides a figure in a straight line from one position to another without changing its shape or orientation.

Front

What is the effect of a 180-degree rotation about the origin on the point (x, y)?

Back

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

Front

What is the difference between a reflection and a rotation?

Back

A reflection flips a figure over a line, while a rotation turns a figure around a point.