Monday, January 05, 2009
Geometry (Class 39)
Announcements
Test Wed. 12/17 focusing on proving lines parallel.
Lesson Title
Constructions 2
Overview
During the warm-up today students will participate in an activity which helps to explain how our memory works. We will discuss the implications as they relate to studying for finals. After this we will score two example proofs from the last test. The lesson for the day focuses on straight edge and compass constructions. During the last part of the class the last test will be returned and students will have some time to make corrections.
Textbook Sections
§3.4 (Txt. p.150) Proving Lines Parallel
Vocabulary
implication
deduction
syllogism
two-column proof
statement
reason
auxiliary line
Key Attitudes
Math is about being convinced a statement is always true.
Key Ideas
A converse of an If, then statement can be created by switching the position of the hypothesis (if) and conclusion (then).
Not all converses are true.
If an if, then statement and its converse are true, then the statement is a biconditional.
Key Skills
I can create and solve a problem involving parallel lines and a “bent” transversal.
I can prove lines parallel.
Turn-In (#38)
Constructions 1 #TBA
Handouts
Constructions 2
Assignment
Test Corrections
Constructions Practice
Txt. p. 63 #1-15
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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