Friday, March 30, 2007
Geometry (Class 64)
Announcements
Quiz Friday, March 30 focusing on Chapter 9 Lessons 1, 2, and 3 (Classes 57 to 63).
Overview
Today’s class focuses on circles and on taking Quiz 10 covering right triangle trigonometry and applications of the Pythagorean Theorem.
Textbook Sections
§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
The measure of an inscribed angle is 1/2 the measure of its central angle.
The measure of a minor arc is equal to the measure of the central angle.
The measure of a major arc is equal to 360-the measure of the minor arc.
A tangent to a circle is perpendicular to the radius at the point of tangency.
Key Skills
Simplifying square roots.
Using properties of special right triangles to solve problems.
Vocabulary
circle
center
chord
diameter
radius
central angle
inscribed angle
minor arc
major arc
tangent
point of tangency
Handouts
Chapter 10-Lesson 1: The Measure of an Inscribed Angle
Chapter 10-Lesson 2- Tangent to a Circle
Assignment
Chapter 10- Lesson 1- All practice problems and finish packet.
Txt. p.608 #32-41
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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