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

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Heron’s Formula Click the triangle!

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Heron’s Formula

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Example- Find the area

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Law of Cosines/Cosine Rule

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Examples

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Using Sine & Cosine Rules

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Example

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Example- Use Law of Cosines!

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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

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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

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Notes Over 8.2 Solving Oblique Triangles To solve an oblique triangle, you need to be given one side, and at least two other parts (sides or angles).

Notes Over 8.2 Solving Oblique Triangles To solve an oblique triangle, you need to be given one side, and at least two other parts (sides or angles).

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