Monday, March 26, 2007
Geometry (Class 62)
Announcements
Quiz Friday, March 30 focusing on Chapter 9 Lessons 1, 2, and 3 (Classes 57 to 63).
Overview
Some right triangles are special. Today we see which triangles these are, and why they are considered special. We then use their “specialness” to solve problems. As time permits, we begin our study of Chapter 10- Circles.
Textbook Sections
§9.4 (Txt. p.551) Special Right Triangles
§10.3 (Txt. p.613) Inscribed Angles
§10.1 (Txt. p.595) Tangents to Circles
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.
Key Skills
Simplifying square roots.
Vocabulary
special right triangle
30-60-90 triangle
isosceles right triangle
Handouts
Chapter 9-Lesson 3: Special Right Triangles
Chapter 10- Lesson 1: The Measure of an Inscribed Angle
Assignment
Chapter 9-Lesson 3 Practice Problems (end of the packet) #1-8, 18-26
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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