7.4 Notes Parallel Lines and Proportional Parts

1. 7.4 Notes Parallel Lines and Proportional Parts Today’s Objectives: 1. Students will be able to use proportional parts within triangles.   2. Students will be able to use proportional parts with parallel lines.

3. Example 1 a) In , SV = 3, VR = 8, and UT = 12. Find SU.

4. Example 1 cont. b) In , AX = 4, XB = 10.5, and CY = 6. Find BY.

5. You Try! In Find FG.

7. Example 2 a) Determine whether . Explain.

8. Example 2 cont. b) In WXZ, XY = 15, YZ = 25, WA = 18, and AZ= 32. Determine whether .

10. Example 3 a) In the figure, are midsegments of ΔABC. Find AB, FE, and mAFE.

11. Example 3 cont. b) In the figure, and are mid-segments of ΔABC. Find BC, DE, and mAFD.

13. Example 4 In the figure, Larch, Maple, and Nuthatch Streets are all parallel. The figure shows the distances in between city blocks. Find the value of x.

15. Example 5 Find the values of x and y.

16. Summary 1. x = _____ y = _____ 2. x = _____ y = _____

17. Summary

18. Summary

19. Summary

20. Homework: pg. 495, #10 – 24 even, 38, 40