Congruence, Similarity, and Scale Factor

Complete the similarity statement.

• they are not similar

Find the value of x and y.

What does congruent mean?

• Same shape, different size

• Not same shape, or size

• Same size, same shape

The triangles are congruent. Which of the following statements must be true?

• ∠A ≅ ∠D

• ∠B ≅ ∠E

• AB ≅ DE

• BC ≅ FD

The two right triangles below are similar. What is x, the missing side length in triangle DEF? 

• 3.75

• 9.75

• 10

• 12

The pair of figures is similar. Find the missing side.

• x = 1

• x = 3

• x = 9

• x = 5