Rigid Motions
Also called a 'flip'.
What is a Reflection
The coordinates of (x,y) when reflected across the x-axis
What is (x,-y)?
In words, r (90, O) (x, y) = (-y, x) means...
What is a 90 degree rotation about the origin?
The coordinate after T <-2,5> of (0, 0)
What is (-2, 5)?
What is the line of reflection?
Also called a turn.
What is a Rotation?
The coordinates of (x,y) when reflected across the y-axis
What is (-x,y)?
In words, r (180, O) (x, y) = (-x,-y) means...
What is a 180 degree rotation about the origin?
The coordinate after T <5,8> of (2, -7)
What is (7, 1)?
The before shape
What is preimage?
Also called a 'slide'.
What is a Translation?
Find the coordinates of the reflection
R y-axis (-2, 5)
What is (2,5)
The direction we complete rotations (unless specified)
What is counterclockwise?
The coordinate after T <-3,-9> of (-1, 4)
What is (-4, -5)?
The after shape
What is image?
Transformations that keep the same size & shape.
What are rigid motions?
Find the coordinates of the reflection
R x-axis (34, -75)
What is (34, 75)?
The other way to rotate a figure
What is clockwise?
Add or Subtract x units along the x-axis
What is the new x-coordinate after a translation?
the angle at which a figure is turned
What is the angle of rotation?
Two rigid motions in which the 2nd transformation is performed on the image of the 1st.
What are compositions of rigid motions?
Find the coordinates of the reflection
R y-axis (-4, -4)
What is (4, -4)?
What is the coordinate of the following rotation
r (360, O) (1, -3)
What is (1, -3)?
AA' // BB' // CC'
AA'=BB'=CC'
ABC and A'B'C' have the same orientation
What are the properties of translations?
The point a rotation is about