Transformations Review

Front

What is a transformation in geometry?

Back

A transformation is an operation that moves or changes a shape in some way to produce a new shape.

Front

What are the four main types of transformations?

Back

The four main types of transformations are translation, rotation, reflection, and dilation.

Front

What is a dilation in geometry?

Back

A dilation is a transformation that changes the size of a shape but not its shape.

Front

How do you find the scale factor in a dilation?

Back

The scale factor is found by dividing the distance from the center of dilation to a point on the image by the distance from the center of dilation to the corresponding point on the original shape.

Front

What happens to the coordinates of a point during a 180-degree rotation?

Back

The coordinates of a point (x, y) become (-x, -y) during a 180-degree rotation.

Front

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

Back

The coordinates change from (x, y) to (y, -x) after a 90-degree clockwise rotation.

Front

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

Back

The coordinates change from (x, y) to (-y, x) after a 90-degree counterclockwise rotation.

Front

What is a reflection in geometry?

Back

A reflection is a transformation that flips a shape 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 shape is reflected to create a mirror image.

Front

What is the difference between a rotation and a reflection?

Back

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