2. Chapter 2 Similarity and Dilations
Lesson 1 properties of similar polygons

3. Vocabulary
Congruent
Similar polygons
Scale factor
~ “is similar to”

4. Properties of Similar Polygons
Similar polygons are figures with the same shape but not necessarily the same size. Similar polygons have the following properties.
Corresponding angles are congruent and corresponding side lengths are proportional.
The ratio of the lengths of a pair of corresponding sides is the scale factor.

5. Example 1 – What do you notice?

6. Try This

7. Example 2 – What do you notice?

8. Try This

9. Properties of Similar Polygons
I can describe attributes of similar polygons.
I can determine missing measures of similar polygons.

10. `
Find the length of the missing side.
10 ft
15 ft
12 ft