Friday, January 18, 2008
Geometry (Class 44)
Announcements
We will not be having a test on Wednesday.
Lesson Title
Defining Parallelograms 2
Overview
In today’s class we examine our ideas concerning what information is necessary and what information is sufficient to infer that a given quadrilateral must be a parallelogram. We then apply our proof writing skills to formally establish our conjectures.
Textbook Sections
§6.1 (Txt. p.322) Polygons
§6.2 (Txt. p.330) Properties of Paralelograms
Key Attitudes
Math is about thinking creatively.
Key Ideas
All polygons can be cut up into triangles.
Our knowledge of triangles can be used to make inferences regarding polygons.
Key Skills
Determining if given information is enough to determine if a quadrilateral is, might be, or is not a parallelogram.
Proving that a given shape is a parallelogram.
Turn-In (#43)
Turn in #43
Txt. p. 388 #3-5,7-21
Finish Chapter 5- Lesson 11
Handouts
Algebra and Geometry 8
Assignment
Finish “Algebra and Geometry 8”
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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