Transformation Review

Transformation Review

Unit 2 Test Review

10/27 A Day

10/28 B Day

Transformation Rules

• Make sure you have these somewhere. They will not be provided on the test.

• Translation (x, y) --> (x +/-__, y +/- __)

• Dilation (x, y) --> (__x, __y)

Transformation Rules Cont.

Rotations

Transformation Rules Cont.

Reflection Rules

Quiz Time

Rotations --> Dilations --> Translations --> Reflections

Multiple Choice

What is the name of the transformation that took place?

• Rotation of 90 degrees

• Rotation of 180 degrees

• Rotation of 270 degrees

• Rotation of 360 degrees

How do you know it was 270 degrees?

Multiple Choice

What is the rule for a 90 degree rotation? (x, y) --> _______

• (+/-y, x)

• (+/-x, y)

• (x, y)

• (y, x)

Multiple Choice

The image is now going to be translated down 2 and to the right 3. A' is at (5, 3). What are the coordinates of A''?

• (3, 4)

• (8, 1)

• (2, 1)

Open Ended

How many degrees was the image rotated?

What is the rule for a 90 degree rotation?

How would you answer this?

Prove that you’ve identified the correct rule by finding the pre-image coordinates for A and then applying the rule to end with the image’s coordinates for A’. 

Multiple Choice

How many degrees was the image rotated?

• 90

• 180

• 270

• 360

The image is then translated to the left 3 and up 4. What are the new coordinates of D''?

Multiple Choice

The point (-4, 6) is being rotated 180 degrees. What are the new coordinates?

• (4, 6)

• (6, -4)

• (4, -6)

• (6, 4)

Multiple Choice

A triangle has the points A(9, 18), B(12, 3) and C(6, 9). The triangle is being dilated by a scale factor of 1/3. What are the coordinates of B'?

• (36, 9)

• (4, 1)

• (3, 3)

What is the scale factor of the dilation?

How would you write the rule?

Multiple Choice

What is the scale factor?

• 3

• 2

• 4

• 1/2

Multiple Choice

What kind of transformation occurred?

• Translation

• Dilation

• Reflection

• Rotation

Find the midpoint between T and T'

•  $\frac{x_1+x_2}{2},\ \frac{y_1+y_2}{2}$  

Find the distance between T and T'

•  $d=\sqrt{\left(x_2-x_1\right)^2+\left(y_2-y_1\right)^2}$  
  

Are segments IR and segment I'R' parallel?

• 
  

Multiple Choice

This is an example of which transformation?

• Translation

• Dilation

• Rotation

• Reflection

What other questions/examples do you want?