1. Law of Cosines Herons Formula Determining b/w Sine & Cosine December 12 th, 2013 December 13 th, 2013

2. Heron’s Formula Click the triangle!

3. Heron’s Formula

4. Example- Find the area

5. Law of Cosines/Cosine Rule

6. Examples

9. Using Sine & Cosine Rules

10. Example

11. Example- Use Law of Cosines!

12. Laws of Sine/Cosine Packet Review the formulas for Law of Sines/Cosines & when you use them For 1-10 set up the problems using BOTH law of sines/cosines, then determine which you should use to solve Solve 11-16 (pick which to use first) 2 pts Extra Credit on test for each challenge question you get right

19. Homework Finish the packet A day Edition 2 Pg. 415 #1-3, 4B Pg. 420 #1 and #3 B day Edition 1 Pg. 340 #1-3, 4B Pg. 344-345 #1 and #3