2. Section 8.3 Similar Polygons
Chapter 8 Similarity
Section 8.3
Similar Polygons

3. Definition Similar Polygons
Trapezoid ~ Trapezoid

4. Corresponding components must line up in the similarity statement

5. Corresponding components must line up in the similarity statement

6. Corresponding components must line up in the similarity statement

9. Definition: Scale Factor
The ratio of any two corresponding sides of similar polygons.
Same no matter what two sides are chosen

10. Scale Factor =

11. Scale Factor 5

14. The Perimeter Ratio is the same as the scale factor
Theorem
The Perimeter Ratio is the same as the scale factor
Scale Factor = Perimeter Ratio

17. Ratio of the perimeters = the ratio of the sides
The perimeter of ABC =