Reflections and Rotations

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 is the line of reflection?

Back

The line of reflection is the line over which a figure is reflected, such as the x-axis or y-axis.

Front

How do you identify a reflection over the y-axis?

Back

A reflection over the y-axis changes the sign of the x-coordinates of the points in the figure.

Front

How do you identify a reflection over the x-axis?

Back

A reflection over the x-axis changes the sign of the y-coordinates of the points in the figure.

Front

What is a rotation in geometry?

Back

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

Front

What does counterclockwise rotation mean?

Back

Counterclockwise rotation means turning a figure in the opposite direction of the hands of a clock.

Front

What does clockwise rotation mean?

Back

Clockwise rotation means turning a figure in the same direction as the hands of a clock.

Front

What is the degree measure of a full rotation?

Back

A full rotation is 360 degrees.

Front

What is the relationship between counterclockwise and clockwise rotations?

Back

A counterclockwise rotation of x degrees is equivalent to a clockwise rotation of 360 - x degrees.

Front

What is the effect of a 180-degree rotation?

Back

A 180-degree rotation turns a figure upside down, resulting in the same orientation as a reflection through the origin.