Unit 4 Flashcard Practice

Front

What is the pre-image of the point H' (18, 2) after a translation using the rule (x, y) -> (x + 5, y - 2)?

Back

(13, 4)

Front

What transformation occurred to line AB with coordinates A (-5, -2) and B (-3, 1) to line A'B' with coordinates A' (-1, -7) and B' (1, -4)?

Back

Translated 4 to the right and 5 down

Front

What rule represents the transformation of triangle JKL to triangle J’K’L’?

Back

(x, y) -> (x + 1, y - 2)

Front

What is the angle of rotation for a decagon?

Back

36 degrees

Front

What are the coordinates of trapezoid VTSU after reflecting over the x-axis?

Back

U' (4, 1) S' (2, 2) T' (2, 3) V' (4, 4)

Front

Define translation in geometry.

Back

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

Front

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

Back

The reflected point is (x, -y).

Front

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

Back

The reflected point is (-x, y).

Front

What is the formula for the rotation of a point (x, y) by 90 degrees counterclockwise around the origin?

Back

(x, y) -> (-y, x)