1. 6.2 Similar Polygons What you’ll learn: To identify similar figures.
To solve problems involving scale factors

2. Similar Polygons
Similar polygons have the same shape (angles) but are different sizes (side lengths)
Two polygons are similar iff their corresponding angles are congruent and the measures of their corresponding sides are proportional.
Symbol ~
Statement ABC~DEF means that AD, BD, CF and

3. Scale Factor
The scale factor between 2 similar figures is a ratio between 2 corresponding sides. To find a scale factor, find 2 corresponding sides and write as a ratio. Reduce if necessary.

4. Determine whether each pair of figures is similar. Justify your answer.
1. no – angles are the same 2. K L M R Q P
40
50 A B C R S T
80
60
40
5.2 7 8
3.9
5.25 6

5. The 2 polygons are similar.B C D E R S T U V 4
y+1 6 x 8
Write a similarity
statement.
b. Find the scale factor of
polygon ABCDE to polygon
RSTUV

6. Rectangle WXYZ is similar to rectangle PQRS with a scale factor of If the length and width of PQRS are 10 meters and 4 meters, respectively, what are the length and width of rectangle WXYZ.

7. Homework p.293, even