Similar Triangle Ratios of Corresponding Sides

What is the scale factor from the triangle to the left to the triangle on the right?

• 2

• 3/2

• 2/3

• 1/2

What is the scale factor from ΔDEF to ΔABC?

• 1/2

• 7/3

• 2

• 10/3

Choose the similarity statement for the triangles.

• ΔMNL ∼ ΔOPQ

• ΔNOM ∼ ΔPQL

• ΔLMN ∼ ΔPQO

• ΔMLN ∼ ΔPQO

Are the following similar? Why or why not?

• Yes. All pairs of corresponding angles are congruent and the sides are proportional.

• No, the corresponding angles are not equal.

• No, the ratios of the corresponding sides are not equal.

Which of the following triangles is similar to triangle XYZ?

• 
• 
• 
• 

State if the triangles in each pair are similar. If so, state how you know they are similar.

• A

• B

• C

• D

Explain how to show that the indicated triangles are similar

• SSS

• SAS

• AA

• Not Enough Information

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 

What is ratio of any two corresponding sides?

• Scale Factor

• Corresponding Sides

• Similar Figures