Bell Ringer:List the domain and range of the relation below.

(PSSA)TRANSFORMATIONS

LEQ:How do you translate objects on a coordinate

plane?

RotationsPicture:

Definition:

A transformation in which a figure is turned about a fixed point, called the “center of rotation.”

The size or shape is not changed.

Rotations

Some rotations are turned about a vertex:

EX) Rotate 180 degrees about C

A

B C

Rotations

Some rotations are turned about a vertex:

EX) Rotate 90 degrees clockwise about C

A

B C

Rotations

Some rotations are turned about the origin:

EX) Rotate 180 degrees about the origin

A

B C

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

RotationsSome rotations are turned about the origin:

EX) Rotate 90 degrees about the origin

A

B C

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

RotationsSome rotations are turned about the origin:

EX) Rotate 270 degrees about the origin

A

B C

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

Rotations Stations

One More: Dilations

A transformation that enlarges or reduces a figure by a scale factor relative to a center point.

The center point is called the center of dilation.

Enlargement or Reduction?

Scale Factor = 3

Scale Factor = 1/5

Scale Factor = 1

ENLARGEMENT

REDUCTION

NEITHER

Dilations Class Practice

Dilations Team Huddle

Quiz Tomorrow!

Translations (slides)

Reflections (flip)

Rotations (turn)

Dilations (resize)