Vocabulary
Translations & Reflections
Rotations & Dilations
What's the rule?
Mystery :)
100
What would you call Q and Q' in the following transformation? Why?
They are invariant points because Q is mapped onto itself.
100
What is one word each to describe a translation and a reflection?
translation: slide
reflection: flip
100
What is one word each to describe a rotation and two words to describe a dilation?
rotation: turn
dilation: enlargement/reduction
100
What is the algebraic representation of a translation that moves a figure 2 units left and 3 units up?
(x − 2, y + 3)
100
What are the four types of transformations that can be done to figures?
1. translations
2. reflections
3. rotations
4. dilations
200
Which figure is the image in the following reflection?
Triangle A'B'C' (the blue triangle)
200
What direction does adding to the x-coordinate move a figure?
To the right!
200
Describe when a dilation will be a reduction. An enlargement?
reduction: great than 0, less than 1
enlargement: greater than 1
200
Making both coordinates negative rotates a figure how many degrees?
180°
200
What rotation is the same as rotating 90° counterclockwise?
270° clockwise
300
What types of transformations do not change the size of a figure?
translations, reflections, rotations
300
What coordinate changes when a figure is reflected over the x-axis?
the y-coordinate
300
What scale factor was used to produce the image dilated about the origin?
scale factor = 1/2
300
What is the rule for the following translation:
(1,5) → (3,0)
(x + 2, y − 5)
300
A dilation with a negative scale factor can look like what other transformation?
180° rotation
400
What is the notation symbol used to differentiate the preimage from the image?
prime
400
Describe the given transformation:
translation 1 unit right and 2 units down
400
Describe the following transformation:
rotation 90° clockwise about the origin
400
What is the rule for the following dilation:
(-2,3) → (-4,6)
(2x, 2y)
400
What transformations are isometries (do not change shape or size)?
Translations, Reflections, and Rotations
500
What information do you need in order to complete a rotation?
1. angle of rotation
2. center of rotation
3. direction of rotation
500
If point K is located at (-2,-4) and it is reflected across the y-axis then reflected across the x-axis, what point would K' have?
(2,4)
500
If you have point G at (-3,2) and you rotate it 90 degrees clockwise, what would the point G' be?
(2,3)
500
What rule describes rotating 270° clockwise?
(-y, x)
500
A y-axis reflection of the word WOW would produce this word.
An x-axis reflection of the word WOW would produce this word.
y-axis: WOW
x-axis: MOM