Similar Triangles Polygons

The polygons in each pair are similar. Find the scale factor of the smaller figure to the larger

figure.

• a

• b

Find the value of x:

• 58.3

• 1.7

• 21

• 18

Use the information in the diagram to determine the height of the tree.

• 80 feet

• 320 feet

• 40 feet

• 160 feet

The triangles are similar, solve for the question mark.

• 8

• 18

• 12.5

• 24

Solve for x

• 2

• 4

• 3

• 6

Complete each proportion.

AB / BM = ? / CD

• BC

• MD

• AC

• MC

Determine if the triangles are similar. Justify.

• Yes, SAS

• Yes, SSS

• Yes, AA

• No, not similar

Find the missing side

• 5

• 7

• 9

• 11

Are these two triangles similar and if so, identify the correct similarity statement.

• Yes, AA

• Yes, SAS

• Yes, SSS

• No, they are not similar

What is the scale factor of ΔPRQ to ΔDEF ?

• 5:6

• 3:5

• 2:3

• 5:3