1. TODAY IN GEOMETRY…  Learning Target: 6.6 You will calculate missing sides of triangles using proportionality with parallel lines  Independent Practice  CH.6 TEST – WEDNESDAY/THURSDAY!

2. TRIANGLE PROPORTIONALITY THEOREM: If a line parallel to one side of a triangle intersects the other two sides, then it divides the two sides proportionally.

3. Write a proportion using Triangle Proportionality Theorem Substitute known values Cross Multiply

4. Write a proportion using Triangle Proportionality Theorem Substitute known values Cross Multiply

5. CONVERSE OF THE TRIANGLE PROPORTIONALITY THEOREM: If a line divides two sides of a triangle proportionally, then it is parallel to the third side.

6. Write a proportion using Triangle Proportionality Theorem Substitute known values Cross Multiply

7. Write a proportion using Triangle Proportionality Theorem Substitute known values Cross Multiply

8. Write a proportion using Triangle Proportionality Theorem Substitute known values Cross Multiply

10. PRACTICE: Use the diagram to find the value of each variable.

12. HOMEWORK #6: Pg. 400: 3-11, 13-17 If finished, work on other assignments: HW #1 Pg. 360: 20-52 even HW #2: Pg. 367: 3-12, 16-18 HW #3: Pg. 376: 3-12, 23 HW #4: Pg. 384: 3-14, 21-24, 26 (Graph paper needed) HW #5: Pg. 392: 3-12, 18-23