Unit 3 Test Review

Front

What is a translation in geometry?

Back

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

Front

How do you perform a translation on a point?

Back

To translate a point, add the translation vector's x and y components to the point's coordinates.

Front

What is the result of translating point A(-6, -2) by T(-4, 2)?

Back

The new coordinates are (-6 + (-4), -2 + 2) = (-10, 0).

Front

What is a reflection in geometry?

Back

A reflection is a transformation that flips a figure over a line, creating a mirror image.

Front

What does it mean to reflect a figure across the y-axis?

Back

Reflecting across the y-axis means that for every point (x, y), the new point will be (-x, y).

Front

What is a rotation in geometry?

Back

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

Front

What is the angle of rotation for a 90° clockwise rotation?

Back

A 90° clockwise rotation turns the figure to the right, moving points in a circular path around the center.

Front

How many degrees is a 270° counterclockwise rotation?

Back

A 270° counterclockwise rotation is equivalent to a 90° clockwise rotation.

Front

What is the effect of a reflection across the x-axis on a point?

Back

For a point (x, y), reflecting across the x-axis results in the point (x, -y).

Front

What is the difference between a translation and a reflection?

Back

A translation moves a figure without changing its orientation, while a reflection flips it over a line.