Lesson 5 Checkpoint Prep

Translate 1 unit down and reflect across the x-axis.

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What sequence of transformations will get you from triangle ABC to its image triangle A'B'C'?

• Reflection, then Translation

• Rotation, then Dilation

• Reflection, then Rotation

• Dilation, then Reflection

The __________ is the ratio of a length of the new figure to the corresponding length on the original figure.

• reduction
• enlargement
• scale factor
• center of dilation

In a dilation what mathematical operation is used with the scale factor?

• addition 
• subtraction 
• multiplication 
• division 

Dilate the figure by a scale factor of 3 with the origin as the center of dilation. What are the coordinates of the image?
A(3,3) B(6,6) C(9,3)

• A'(9,9) B'(18,18) C'(27,9)
• A'(6,6) B'(9,9) C'(12,6)
• A'(0,0) B'(3,3) C'(6,0)
• A'(1,1) B'(2,2) C'(3,1)

Identify the scale factor of the following dilation.

• k=2

• k=-2

• k=1/2

• k=-1/2

Which graph shows a dilation?

• Graph A

• Graph B

Which graph shows a dilation?

• Graph E

• Graph F

What is the scale factor of the dilation?

• k = 1

• k = 1/2

• k = 2

• k = 3

Which of the statements is true about the graphed triangles?

• They are similar, because one can be obtained by dilating the other about the origin with a scale factor of 2.
• They are similar, because one can be obtained by dilating the other about the origin with a scale factor of 1/2.
• They are not similar, because one can be obtained by dilating the other about the origin with a scale factor of 2.
• They are not similar, because one can be obtained by dilating the other about the origin with a scale factor of 1/2.