1. Similar Polygons NOTES 8.1 Goals 1)Use Similarity Statements 2)Find corresponding lengths in similar polygons 3)Find perimeters & areas of similar polygons 4)Decide whether polygons are similar

2. Using Similarity Statements

3. Example 1: Using Similarity Statements

4. You Try! 1. In the diagram, ∆JKL~∆PQR. Find the scale factor from ∆JKL to ∆PQR. Then list all pairs of congruent angles and write the ratios of the corresponding side lengths in a statement of proportionality. Scale Factor: 6/9 = 2/3; 4/6 = 2/3; 8/12 = 2/3 The Scale Factor is 2/3 Congruent Angles: Proportionality Statement:

5. Finding Corresponding Lengths in Similar Polygons

6. Example 2: Finding Corresponding Length

7. Example 3: Finding Corresponding Length

8. You Try!

9. Finding Perimeters & Areas of Similar Polygons

10. Example 4: Modeling with Mathematics

13. You Try!

14. Finding Perimeters & Areas of Similar Polygons

15. Example 5: Finding Areas of Similar Polygons

16. You Try!

17. Example 6: Deciding whether Polygons are Similar

18. You Try!