Similar Triangles and Parallel Lines and Proportional Parts

Find the value of x.

• x = 4.5

• x = 9

• x = 30

• x = 3

QR is a midsegment of triangle BCD. Solve for the value of x.

• 11

• 18

• 9

• -7

Are the two triangles similar? If so, how?

• Yes, AA

• Yes, SAS

• No

• Yes, SSS

Find FG

• 8.4

• 5.5

• 5.9

• 5.3

• a

• b

• c

• d

Solve for x.

• x = 2

• x = -1

• x = 1

• x = 5

What is the scale factor from ΔABC to ΔXYZ?

• 1.25

• 1.5

• 2

• 2.5

Which theorem(s) can be used to prove triangle similarity?

• SAS

• AA

• AAS

• SSS

• HL

• x = 10, y = 8

• x = 7.5, y = 10

• x = 10, y = 7.5

• x = 8, y = 10

Which of the following would you use to prove the two triangles are similar?

• SAS

• SSS

• AA