HolcombMath

Monday, April 30, 2007

Geometry (Class 72)

Announcements
Quiz Friday: Chapter 12.1 to 12.5, Chapter 11.1-11.2

CST Part 1, Monday May 14
CST Part 2, Wednesday May 16

Overview
In today’s class we continue our investigation concerning the relationship between the number of sides and the size of the angles of regular polygons and then use our results as a tool for finding the area of regular polygon when: 1) the number of sides and the length of the side are given, or 2) the size of an central, interior, or exterior angle and the length of a side are given.
Textbook Sections
§11.1 (Txt. p.661) Angle Measures in Polygons
§11.2 (Txt. p.669) Areas of Regular Polygons

Key Attitudes
Mathematics is about looking for patterns.

Key Ideas
An exterior angle of a regular polygon is equal to the measure of the corresponding central angle of the polygon.
The number of sides of a regular polygon is equal to 360 divided by the measure of a central angle.
The area of a regular polygon can be found using trigonometry.

Key Skills
Finding the area of a regular polygon when:
1) the number sides and the length of a side are given
2) the size of an central, interior, or exterior angle and the length of a side are given

Turn In
§11.1 (Txt. p.665) #6-8, 14, 15, 17, 18, 22, 23

Handouts
No Handouts Posted

Assignment
§11.1 (Txt. p.665) #10-12, 18, 20, 24, 33-36
§11.2 (Txt. p.672) #9, 16, 19
Chapter 11: Lesson 1- All
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.

Semester 2, Second Six Week Progress Reports

Grades are now posted for the progress reports for the second six-seeks of the second semester. There are only 6 weeks left! It is time to really turn up the effort and sprint for the finish.

Comments for the progress reports were calculated as follows:
If Content % ≤ 70, then a comment on the progress report will be “Low/failing test scores”.
If Learning Behavior % < Content % and Learning Behavior %<80, then a comment will be "Not working to ability".
If the number of missed assignments >4, then a comment will be “Fails to hand in work”.
If Content %≤70 or Overall %≤70 and Content % is not > 80, then a comment will be “Not moving to next level”.

Please contact me, by email is best, if you have comments or questions about your grade or the comments.