# Lesson 13

Congruence

Let’s find ways to test congruence of interesting figures.

### Problem 1

Which of these four figures are congruent to the top figure?

A:

A

B:

B

C:

C

D:

D

### Problem 2

These two figures are congruent, with corresponding points marked.

1. Are angles $$ABC$$ and $$A'B'C'$$ congruent? Explain your reasoning.
2. Measure angles $$ABC$$ and $$A’B’C’$$ to check your answer.

### Problem 3

Here are two figures.

Show, using measurement, that these two figures are not congruent.

### Problem 4

Each picture shows two polygons, one labeled Polygon A and one labeled Polygon B. Describe how to move Polygon A into the position of Polygon B using a transformation.

1.
2.
3.
(From Unit 1, Lesson 3.)