Monday, September 17, 2007
Geometry (Class 7)
Overview
In today’s class we wrap-up Chapter 1- Lesson 3 with the development of a way to find the coordinates of the midpoint of a segment when given the coordinates of the endpoints of the segment. We also get to learn how to use a straight edge and compass to copy a segment, create a perpendicular bisector of a segment, bisect an angle, copy an angle, and divide a line segment into as many equal pieces as needed.
Check out the Math Open Reference for animated lessons on constructions with straight edge and compass.
Textbook Sections
§1.5 (Txt. p.34) Segment and Angle Bisectors
Key Attitudes
Math is about investigating.
Key Ideas
The coordinates of the midpoint of a segment can be found by averaging the change in x and the change in y of the coordinates of its endpoints.
A straightedge and compass can be used to solve geometric problems.
Key Skills
Find the midpoint of segment given the coordinates of the endpoints of the segment.
Use a straight edge and compass to:
copy a segment
create a perpendicular bisector of a segment
bisect an angle
copy an angle
create n equal divisions of a segment
Turn-In (#6)
Chapter 1- Lesson 3 through #12
Txt. p.29 #17-41, 61, 64, 67, 70-75
Handouts
No Handouts Posted
Assignment
Txt. p.38 #17-20, 25, 26, 31, 32, 37-39
Finish construction worksheets.
Txt. p124 #1-4, 13-16
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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