1. Math 4-5: Similar Polygons
Objective: How to identify similar polygons and find missing measures of similar polygons.

2. Vocabulary
polygon – a closed figure in a plane formed by three or more line segments
similar – polygons with the same shape (not necessarily the same size)
corresponding parts – parts of congruent or similar figures that match
congruent – the same measure
scale factor – the ratio of the lengths of two corresponding sides of two similar polygons

3. Similar Polygons 2 polygons are similar if AND
corresponding angles are congruent (have same measure)
AND
corresponding sides are proportional

4. Similar Polygons

5. Identify Similar Polygons

6. Identify Similar Polygons

7. Scale Factor
ratio of lengths of two corresponding sides of two similar polygons
The scale factor from square ABCD to square LMNO is 6/3 or 2
The scale factor from square LMNO to square ABCD is 3/6 or 1/2

8. Find Missing Measures

9. Assignment 4-5 PS (a) Graphing Activity – due 10/28
Chapter 4 Test – 10/28