Intro To Similarity

Two objects that are the same shape but not the same size are _______.

• Congruent
• Vertical
• Similar
• Complementary 

Sides in similar figures must be proportional.  

• True
• False 

⊿ABC ~ ⊿LMN, AB = 12, BC = 10, LN = 9, and LM = 6. What is the scale factor of ⊿ABC to ⊿LMN?

• 2/1
• 6/5
• 4/3
• 1/2

What is the value of X?

• X=4
• X=6
• X=3
• X=2

Complete the similarity statement.
ABC ~ ___

• ZYX
• XZY
• YZX
• XYZ

AB = 4.  After a dilation, A'B' = 10.  What is the scale factor for the dilation?

• 5/2
• 10
• 4
• 2/5

In similar figures, corresponding angles are ___________________ and corresponding sides are _________________________.

*Explain your answer on your answer sheet*

• proportional, proportional

• congruent, congruent

• proportional, congruent

• congruent, proportional

Given: $\Delta MNO\sim\Delta PQR$ 

Select the correct proportion that represents the corresponding sides.

•  $\frac{NO}{QR}=\frac{MN}{PR}=\frac{MO}{PQ}$  

•  $\frac{MO}{QR}=\frac{MN}{PQ}=\frac{NO}{PR}$  

•  $\frac{MN}{PQ}=\frac{NO}{QR}=\frac{MO}{PR}$  

•  $\frac{MN}{PQ}=\frac{MO}{QR}=\frac{NO}{PR}$  

Given: $\Delta CDE\sim\Delta FGE$  

What is the value of x?

• 16.9

• 37

• 43.2

• 42

Given: $\Delta JKL\sim\Delta QRS$ 

Find x.

•  $-\frac{1}{3}$  

•  $-4$  

•  $\frac{4}{6}$  

• 2