2.  Two polygons are similar polygons if corresponding angles are congruent and if the lengths of corresponding sides are proportional.

3.  An Extended Proportion is a comparison of three or more proportions.

4.  A scale factor is the ratio of corresponding linear measurements of two similar figures. 15 20 25 6 8 10

5.  Are the polygons similar? If they are, write a similarity statement and give the scale factor. 6 6 12 6 24 14 16 Compare the ratios of corresponding sides. Corresponding sides are not proportional, so the polygons are not similar.

6.  Are the polygons similar? If they are, write a similarity statement and give the scale factor. 8 20 Compare the ratios of corresponding sides. Corresponding sides are proportional, so the polygons are similar. The similarity statement is and the scale factor is 12 16 10 15

7.  P. 444 #’s 11, 14-30, 37-38, 51-61