Dilations & Similarity Review

Choose the correct scale factor:

• 2
• 3
• 1/3
• 1/2

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)

Find missing side

• 5
• 7
• 9
• 11

• A

• B

• C

• D

(x, y) -> (2x, 2y) 
What is the coefficient 2 mean?

• plot 2 to the right and 2 up
• scale factor is 2 creating a new figure half the size
• scale factor is 2 making a figure twice the 
  original
• I don't understand this question : ( 

A dilation is which of the following: 

• An enlargement
• A reduction
• Either an enlargement or a reduction
• Neither an enlargement or a reduction

Which of the following is the algebraic representation for a dilation?

• (x, y) → (x, 3y)
• (x, y) → (3x, 3y)
• (x, y) → (x, y - 3)
• (x, y) → (.5x, .4y)

• 32 inches
• 64 inches
• 112 inches
• 224 inches

Which rule shows the transformation?

• (x, y) ----> (0.5x, 0.5y)
• (x, y) ----> ( 2 + x, 2 + y)
• (x, y) -----> (2x, 2y)
• (x, y) -----> (3x, 3y)

If two figures are similar their angles are______.

• proportional
• congruent
• supplementary
• complementary