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PreCalculus 6-1 Law of Sines. This lesson (and the next) is all about solving triangles that are NOT right triangles, these are called oblique triangles.

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Presentation on theme: "PreCalculus 6-1 Law of Sines. This lesson (and the next) is all about solving triangles that are NOT right triangles, these are called oblique triangles."— Presentation transcript:

1 PreCalculus 6-1 Law of Sines

2 This lesson (and the next) is all about solving triangles that are NOT right triangles, these are called oblique triangles

3 Law of Sines Triangles that can be solved Solved in next lesson

4 Law of Sines

5

6

7

8

9

10

11

12

13 Area of an Oblique Triangle Area =

14 Law of Sines

15 PRACTICE PROBLEMS Practice Problems

16 Law of Sines 1.31 2.57

17 Law of Sines 31.0° 69.0° 6.2

18 Law of Sines  C=47° a=26.7 b=64.2

19 Law of Sines  A=70° a=109.7 b=20.3

20 Law of Sines  B=89.6° b=49.8  C=53.4°  B=16.4° b=14.1  C=126.6°

21 Law of Sines  B=34.4° c=25.9  C=10.6°

22 Law of Sines 5.25

23 Law of Sines Homework pg. 398 – 400 3 – 7 odd, 15 – 19 odd, 21, 22, 35, 38

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