1. Chapter 7 Lesson 5: Parts of Similar Triangles
Geometry CP
Mrs. Mongold

2. Proportional Perimeters Theorem
If two triangles are similar, then the perimeters are proportional to the measures of corresponding sides. 2 2
SF = ¼
P of small is 6
P of big is 24
6:24
1:4 8 8 2 8

3. Special Segments of Similar Triangles
Similar Triangles have corresponding altitudes that are proportional to corresponding sides. U Q P R A V W T

4. Special Segments of Similar Triangles Continued
Similar triangles have corresponding angle bisectors that are proportional to the corresponding sides U Q V R X P T B

5. Special Segments of Similar Triangles Continued
Similar Triangles have corresponding medians proportional to the corresponding sides. U Q V R Y P T M

6. Angle Bisector Theorem
An angle bisector in a triangle separates the opposite side into segments that have the same ratio as the other two sides. C B A D

7. Homework
Pg 30/9 & 10
Pg 31/7& 8
Pg 36