Parts of Similar Triangles and Parallel Lines

A road sign that is 20 ft tall casts a shadow that is 25ft long. A second road sign casts a shadow that is 15ft long.  What is the height of the second road sign?

• 5 ft

• 10 ft

• 15 ft

• 12 ft

What is the scale factor from ΔABC to ΔDEF?

• 1/2

• 7/3

• 2

• 10/3

What is the scale factor from ΔABC to ΔXYZ?

• 1.25

• 1.5

• 2

• 2.5

What do the arrows on these triangles represent?

• Perpendicular lines

• Parallel lines

• Transversals

• Congruent

Determine whether the triangles are similar by AA~, SSS~, SAS~, or not similar.

• AA

• SSS

• SAS

• Not similar

Same Shape , Different Size

• Congruent

• Similar

• Diagonal

• Bisect

• ML

• MK

• JN

• JK

If JL = 18, LN = 16, and MN = 9, find JK.

• JK = 10.125

• JK = 9.5

• JK = 18

• JK = 8

Given the triangles are similar, find x.

• x = 4

• x = 2

• x = 16

• x = 20

Given the triangles are similar, find x.

• x = 9

• x = 8

• x = 16

• x = 12