1. Properties of Similar Polygons
Lesson #4
Pg. 131

2. Vocabulary Similar Polygons Scale Factor Math Symbols
Polygons that have the same shape
Scale Factor
The ratio of the lengths of two corresponding sides of two similar polygons
Math Symbols
Congruent
Similar ~

3. What you will learn… Similar Polygons Finding missing measures

4. Real World Link Are the prints in proportion?
Are the side lengths in proportion?
What do you notice about the angles?
Figure
Side Length (cm)
Angle Measure (cm)
∆𝐸𝐹𝐷 DE EF FD
∆𝐿𝐽𝐾 LJ JK KL

5. Similar Polygons If two polygons are similar, then…
There corresponding angles are congruent
The measures of their corresponding sides are in proportion
Symbols X Y Z A B C

6. Examples
Determine whether rectangle HJKL is similar to rectangle MNPQ. Explain. 6 N P 3 J K 7 7 10 10 H L 3 M Q 6

7. Examples Quadrilateral WXYZ is similar to quadrilateral ABCD
Describe the transformations.
Find the missing measure. X 13 12 10 24 m 15 A D W B Y C Z

8. HC: pg. 135-136 (1-11) CC: pg. 135-136 (1-5, 7, 9-11) www.ixl.com H8
Homework
HC: pg (1-11) CC: pg (1-5, 7, 9-11)   H8