Transformations - Geometry - Pract. Flashcard - 4.29.21 - Mr. V

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 scale factor in a transformation?

Back

The ratio of the size of the image to the size of the original figure.

Front

What does it mean to translate a figure?

Back

To move every point of the figure the same distance in the same direction.

Front

What is a rotation in geometry?

Back

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

Front

What is the rule for reflecting a point (x, y) across the x-axis?

Back

(x, -y)

Front

What is the rule for reflecting a point (x, y) across the y-axis?

Back

(-x, y)

Front

What is the rule for rotating a point (x, y) 90 degrees clockwise around the origin?

Back

(y, -x)

Front

What is the rule for rotating a point (x, y) 180 degrees around the origin?

Back

(-x, -y)

Front

What is the rule for rotating a point (x, y) 90 degrees counterclockwise around the origin?

Back

(-y, x)

Front

What does it mean when an object is dilated?

Back

To resize the object by a scale factor, either enlarging or reducing it.