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 transcript:

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

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

Law of Sines

Area of an Oblique Triangle Area =

Law of Sines

PRACTICE PROBLEMS Practice Problems

Law of Sines

Law of Sines 31.0° 69.0° 6.2

Law of Sines  C=47° a=26.7 b=64.2

Law of Sines  A=70° a=109.7 b=20.3

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

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

Law of Sines 5.25

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