Unit 5: Law of Sines and Cosines
Pg 49-50 Started this unit with the investigations by Illumination that develop the Law of Sines and Cosines. Then we used these pages to practice the formulas.
Pg 53-54 Similar to our Law of Sines pages, we developed the formulas and then practiced the Law of Cosines.
Pg 55-56 We practiced word problems by first using the COS diagram (Thanks Meg Craig!) to decide when to use LoC and when to use LoS.
Here are the files:
See my update to this unit this year with area of oblique triangles.
I'm trying to make sense of these two laws and am a bit confused on your example page for law of sines. It has a triangle with 2 sides and 1 angle. I thought you couldn't use law of sines for that. I'm sure there's a reason you can, I just don't quite understand it! Help!
ReplyDeleteGood point- I didn't notice that. The SSA is the ambiguous case because there are two possible triangles so two possible answers. My example shows just one answer.
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