1. 8.6 Proportion and Similar Triangles

2. Theorem Triangle Proportionality Theorem
If a line is parallel to one side of a triangle and intersects the other two sides, then it divides the two sides proportionally.

3. Converse of the Triangle Proportionally Theorem
If a line divides two sides of a triangle proportionally, then the line is parallel to the remaining side.

4. Theorem
If three parallel lines are intersected by two lines, then the lines are divided proportionally.

5. Theorem
If a ray bisects one angle of a triangle, then it divides the sides proportional with the sides they are touching.

6. Solve for x

7. Solve for x

8. Show that DE // BC

9. Show that DE // BC

10. Solve for x

11. Solve for x

12. Solve for x

13. Solve for x

14. Homework
Page 502 – 503 #

15. Homework
Page 503 – 505
# 29 – 31,
34 – 37, 39,
41 – 50