Transformations

Question 1

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What is a rigid motion?

Answer 1

A transformation that preserves the size & shape of the figure

Question 2

What is a preimage?

Answer 2

The figure before the transformation

(Remember! Previews are before the movies)

Question 3

What is an image?

Answer 3

The figure after the tranformation

Question 4

What do we include in our labels to indicate that a transformation (or two) happened?

Answer 4

Primes (or double primes for two transformations)

Question 5

What type of movement is a translation?

Answer 5

slide

Question 6

What type of movement is a rotation?

Answer 6

spin (or turn)

Question 7

What type of movement is a reflection?

Answer 7

flip (or mirror)

Question 8

What type of movement is a dilation?

Answer 8

Shrink / grow

Question 9

What info must you include when describing a translation?

Answer 9

Distance (# of units ) & direction (up, left, right, down)

Question 10

What info must you include when describing a rotation?

Answer 10

Center point, size of angle, direction (clockwise/counterclockwise)

Question 11

What info must you include when describing a reflection?

Answer 11

Line of reflection (equation or axis)

Hmm…reflection is the only transformation that we DON’T have to specif

Question 12

What info must you include when describing a dilation?

Answer 12

Center point, scale factor

Question 13

Which transformation(s) produce figures congruent to the preimage?

Answer 13

Translations, reflections, rotations (all the rigid motions!)

Question 14

When does a dilation produce a congruent figure?

Answer 14

When the scale factor is 1

Question 15

Which transformation(s) reverse the orientation of a figure?

Answer 15

Reflection

Question 16

Which transformation(s) cause corresponding sides to be parallel?

Answer 16

Translations, Dilations, Rotations of 180

Question 17

Which transformation(s) cause corresponding sides to be perpendicular?

Answer 17

Rotations of 90 or 270

Question 18

When a horizontal line is rotated 90 degrees, it becomes…

Answer 18

Vertical

Question 19

When a diagonal line is rotated 90 degrees, it becomes…

Answer 19

Diagonal

Question 20

When a vertical line is rotated 90 degrees, it becomes…

Answer 20

Horizontal

Question 21

If ABC maps onto DEF, which point corresponds with with C?

Answer 21

Point F

Follow the ordering of the letters! (ABC maps onto DEF)

Question 22

What is a sequence of transformations?

Answer 22

Multiple transformations performed back to back

Question 23

What is another name for rigid motion?

Answer 23

Isometry

Question 24

What does “map onto itself” mean?

Answer 24

The shape lands directly on top of the original figure after the transformation