A move of a point or set of points from one place to another. Congruence and orientation is maintained.
What is a translation?
100
This is the algebraic representation for a translation.
What is (x,y) - (x+a, y+b)?
100
These are the only four rotations that we have studied this unit.
What are 90, 180, 270, and 360 degrees?
100
This is the algebraic representation for a reflection across the x-axis.
What is (x,y) - (x, -y)
100
This is the algebraic representation for a dilation.
What is (x,y) - (ax, ay)?
200
Also called a flip, this transformation requires that either the x or y portion of each point in the figure changes sign.
What is a reflection?
200
These two things are maintained no matter how far a figure is translated.
What are congruence and orientation?
200
This amount of rotation is equivalent to reflecting a figure across the x-axis and then transforming that image across the y-axis.
What is a 180 degree rotation?
200
This is the algebraic representation for a reflection across the y-axis.
What is (x,y) - (-x, y)
200
This is the scale factor if point A(2,6) is transformed to point A'(6,18).
What is 3?
300
The type of transformation in which a set of points is turned by 90, 180, 270, or 360 degrees.
What is a rotation?
300
This is the algebraic representation for a translation in which a figure is moved 4 units left and 6 units up.
What is (x,y) - (x-4, y+6)?
300
These are the names of the only two directions of rotations which we have studied this unit.
What are clockwise and counter-clockwise?
300
A left to right (or vice-versa) reflection.
What is a reflection across the y-axis?
300
This is the scale factor if point A'(2,1) is transformed from point A(8,4).
What is 1/4?
400
The type of transformation in which a figure is changed in size by a specific scale factor.
What is a dilation?
400
This is the algebraic representation for a figure that is translated 3 units right, 4 units down, and reflected across the y-axis.
What is (x,y) - (-x+3, y-4)
400
This will always be maintained no matter the angle of rotation or the distance from the origin.
What is congruence?
400
Triangle ABC with points A(x,y), B(x,y), and C(x,y) is transformed into triangle A'B'C' with points A'(x,-y), B'(x,-y), and C'(x,-y). This is the type of transformation.
What is a reflection across the x-axis?
400
This is the scale factor if the side length of a picture were increased from 4 inches to 8 inches.