Transformations Review Flashcard

Front

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

Back

(x, y) → (y, -x)

Front

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

Back

(x, y) → (x, -y)

Front

What is the rule for rotating a point (x, y) 90° counter-clockwise about the origin?

Back

(x, y) → (-y, x)

Front

What is a translation in geometry?

Back

A transformation that moves every point of a figure the same distance in the same direction.

Front

Identify the transformation: A figure is moved 5 units left and 1 unit up.

Back

Translation 5 units left, 1 unit up.

Front

What type of transformation is a flip over a line?

Back

Reflection.

Front

What is the effect of a dilation transformation?

Back

It changes the size of a figure but not its shape.

Front

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

Back

(x, y) → (-x, y)

Front

What is the difference between rotation and reflection?

Back

Rotation turns a figure around a point, while reflection flips it over a line.

Front

What is the rule for a 180° rotation about the origin?

Back

(x, y) → (-x, -y)