Similar Triangles and Polygons

The ratio of the corresponding sides of two similar triangles is 3:5.  What is the ratio of the perimeters of these triangles?

• 5:3

• 9:25

• 3:5

• 6:10

• 2
• 10
• 12
• 15

How do these triangles appear to be similar?
(Hint: Look for non-labeled parts!)

• AA

• SAS

• SSS

• Not Similar

Which statement about the triangles at the right is true?

• ABC is similar to ADF

• ∠BAC is not congruent to ∠DAF

• ABC is congruent to ADF

• ABC is not similar to ADF

Find side length X.

• 16

• 18

• 2.4

• 15

State the postulate that proves these triangles are similar.

• SSS

• SAS

• AA

• Not similar

Are these two triangles similar?  

• Yes, by the SAS postulate

• Yes, by the SSS postulate 

• Yes, by the AA postulate

• No, they are not similar 

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

• Congruent

• Vertical

• Similar

• Complementary 

All angles in similar figures are congruent.  

• True

• False

In similar Polygons, corresponding sides are ___ and corresponding angles are ___. (Fill in the blanks)

• congruent, proportional 

• proportional, congruent 

• congruent, congruent

• proportional, proportional