Rules for Transformations Geometry

What rule represents a rotation of 90 degrees counterclockwise about the origin?

• Flip & change sign on x-value.

• Change sign on x-value.

• Flip & change sign on y-value.

• Change sign on both x-value and y-value.

During a translation, if the figure is moving right what do you need to do to the coordinates?

• add to the x-value

• add to the y-value

• subtract from the x-value

• subtract from the y-value

During a translation, if the figure is moving left what do you need to do to the coordinates?

• add to the x-value

• add to the y-value

• subtract from the x-value

• subtract from the y-value

Which of the following describes the sequence of transformations shown?

• Reflect across the x-axis and then rotate -90 degrees around the origin

• Rotate -90 degrees around the origin and then translate down.

• Reflect across the x-axis and then reflect across the y-axis.

• Translate up and then rotate 90 degrees about the origin.

What is the sequence of transformations for the image given?

• Reflect over the x-axis, translate (x+8,y)

• Reflect over the x-axis then translate (x+6, y)

• Reflect over the y-axis then (x+1, y+1)

• Translate down 4 (y-4) and to the right 5 (x+5)

Which transformations keep figures congruent?

• translation, reflection, and dilation

• reflection, rotation, and dilation

• dilation, translation, reflection, and rotation

• translation, reflection, and rotation

What are the coordinates of C(-6, 2) and B(-1, -1) if rotated 90 degrees counterclockwise?

• C' (-6, 2), B' (-1, -1)

• C' (6, 2), B' (1, -1)

• C' (2, -6), B' (-1, -1)

• C' (-2, -6), B' (1, -1)

What rule represents a rotation 180 degree about the origin?

• Flip & change sign on x-value.

• Change sign on x-value and y-value.

• Flip & change sign on y-value.

• Flip x-value and y-value.

Translations, rotations, and reflections are three different types of what?

• Transformations

• Geometry

• Vectors

• Shapes

Describe the transformation:

(x, y) -> (-y, x)

• reflection across the x-axis

• reflection across the y-axis

• rotation 90 degrees clockwise

• rotation 90 degrees counterclockwise