Translations, Reflections, & Rotations Flashcard Review

Front

What is a 90° rotation clockwise rule?

Back

(x, y) → (y, -x)

Front

What is a 270° rotation clockwise rule?

Back

(x, y) → (-y, x)

Front

Which transformation does not preserve congruency?

Back

Dilation

Front

What is the algebraic rule for a translation of (x + 2, y - 1)?

Back

Move 2 units right and 1 unit down.

Front

What are the coordinates for A' after a 90° rotation clockwise if A is at (1, 3)?

Back

(3, -1)

Front

What is the effect of a reflection over the x-axis on the point (x, y)?

Back

(x, -y)

Front

What is the effect of a reflection over the y-axis on the point (x, y)?

Back

(-x, y)

Front

What is the effect of a translation (x - 1, y + 2) on the point (3, 4)?

Back

(2, 6)

Front

What is the effect of a rotation 90° counterclockwise on the point (x, y)?

Back

(-y, x)

Front

What is the effect of a rotation 180° on the point (x, y)?

Back

(-x, -y)