Similar Triangles and Parallel Lines

How are the triangles similar?

• AA

• SAS

• SSS

• NEI or Not Similar

Given: PQ || BC.  Find the length of AB.

• 14

• 11

• 16

• 18

Find the value of x.

• x = 4.5

• x = 9

• x = 30

• x = 3

Find the value of x

• 14.7

• 49.5

• 22

• 18

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

Calculator Permitted

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• a

• b

• c

• d

Are the triangles similar?

• Yes

• No

What do the arrows on these triangles represent?

• Perpendicular lines

• Parallel lines

• Transversals

• Congruent

Is ABC ~ DEC? Explain.

• No; They are both right triangles but all of their sides are different, so they are not similar.

• Yes; They share two sides, so they are similar.

• Yes; They are both right triangles and they share the common angle C, so they are similar.

• There is not enough information to tell whether they are similar.