Determine Similarity

Given the two triangles are similar, which side is corresponding to PR?

• DE

• EF

• DF

• FD

Find the scale factor (common ratio) between the two triangles.

• 3/2

• 1

• 9/4

• 4/9

Which side is corresponding to 7?

• 15

• 18

• 21

• 5

Which side is corresponding to 18?

• 5

• 6

• 7

• 15

What ratio would I use for the side 5 and its corresponding side?

• 15/5 = 3

• 21/5

• 18/5

• 7/5

Find the scale factor of the following triangles. (make sure to simplify)

• 18 to 5

• 15 to 6

• 5 to 7

• 3 to 1

Determine if the following figures are similar or not using common ratios.

• Yes, because 1/8 = 14/122

• No, because 1/8 is not equal to 14/122

• Yes, because 1/8 is not equal to 14/122

Determine whether the triangles are similar(name the postulate or theorem you used).

• SSS similar

• AA similar

• SAS similar

Determine whether the triangles are similar or not. If so, state how they are similar.

• Yes, by AA Similarity

• Yes, by SAS Similarity

• Yes, by SSS Similarity

• No, not similar

Complete the similarity statement.
ABC ~ ___

• ZYX

• XZY

• YZX

• XYZ