Wednesday, March 28, 2007
Geometry (Class 63)
Announcements
Quiz Friday, March 30 focusing on Chapter 9 Lessons 1, 2, and 3 (Classes 57 to 63).
Overview
Today we finish our work with special right triangles and turn our focus towards circles. In particular we study the relationship between the central angle and an inscribed angles.
Textbook Sections
§9.4 (Txt. p.551) Special Right Triangles
§10.3 (Txt. p.613) Inscribed Angles
Key Attitudes
Mathematics is about looking for patterns.
Key Ideas
Half of a square and half of a equilateral triangle create special right triangles whose side lengths can be determined without the use of trigonometric tables.
An inscribed angle is 1/2 the central angle for the same arc.
Key Skills
Simplifying square roots.
Using properties of special right triangles to solve problems.
Vocabulary
inscribed angle
central angle
tangent line
point of tangencey
Handouts
No Handouts Posted
Assignment
Chapter 9-Lesson 3 Practice Problems (end of the packet) #9-12, 17, 27, 28, 37, 39
Finish Chapter 9-Lesson 3. (Not all the practice problems!) You will be handing in this work with the practice problems you have finished next class.
B4 also needs to complete Chapter 10-Lesson 1 Practice Problems a, b, c (Go ahead and do more of them if you want to get ahead-- all will be assigned next time.)
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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