2 Similar Polygons: Two polygons where corresponding angles are congruent and corresponding side lengths are proportional (not congruent)Symbol for similarity is ~
3 Scale Factor: In two similar polygons, the ratio of the lengths of two corresponding sides. All corresponding sides have the same ratio for similar polygons.
4 Theorem 6.1 Perimeters of Similar Polygons If two polygons are similar, then the ratio of their perimeters is equal to the ratios of their corresponding sides(scale factor).
5 Example: In the diagram, List all pairs of congruent angles.Check that the ratios of corresponding sides lengths are equal.Write ratios of the corresponding side lengths in a statement of proportionality.What is the scale factor?What is the ratio of the perimeters?
6 Are these triangles similar? If yes, what is the scale factor?What is the ratio of the perimeters?