Thursday, May 31, 2007
Geometry (Class 83)
Overview
In our last class we learned how to use the Law of Sines to solve triangles which did not include a right angle. However the Law of Sines is only a partial solution. In today’s class we will learn about situations where the Law of Sines will not work. Not to worry-- we have the Law of Cosines to use in case the Law of Sines will not work.
Textbook Sections
Supplementary-- Law of Cosines
Vocabulary
Law of Cosine
Expanded form
Factored form
Key Attitudes
Mathematics is about looking for patterns.
Key Ideas
The Law of Cosines is a generalization of the Pythagorean Theorem.
Key Skills
Using inscribed angles, right triangle trigonometry, and algebra to develop the Law of Cosines.
Using the Law of Cosines to solve triangles
Turn-In (#82)
Final Review 3
Handouts
Chapter 13- Lesson 2: Law of Cosines
Assignment
Final Review 4
Finish Law of Sines
Disclaimer- The assignment as stated in class is the official assignment. Every effort is made to keep this posting accurate, but you should refer to what was stated in class as the final word.
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