Determining Similar Figures with Proportions

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

Choose the similarity statement for the triangles.

• ΔMNL ∼ ΔOPQ
• ΔNOM ∼ ΔPQL
• ΔLMN ∼ ΔPQO
• ΔMLN ∼ ΔPQO

What is the similarity statement for the triangle pair?

• ΔXYZ~ΔNEW
• ΔXZY~ΔNWE
• ΔZYX~ΔENW
• ΔYZX~ΔNWE

Are the following similar? Why or why not?

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

What is the scale factor?

• 4

• .25

• 5/7

• 21

What is the scale factor?

• 1/2
• 7/3
• 2
• 10/3

What is the scale factor from triangle ABC to triangle DEF?

• 2
• 3/2
• 2/3
• 1/2

The pair of figures is similar. Find the missing side.

• x = 12
• x = 3
• x = 40
• x = 4

The pair of figures is similar. Find the missing side.

• x = 20
• x = 12
• x = 5
• x = 4