Wednesday, October 17, 2007
Geometry (Class 18)
Announcements
Test 3 is this Friday. It will focus on writing proofs.
Overview
In today’s class we continue getting better at writing proofs. In groups we will use “reason cards” to arrange the reasons for proofs. You will want to create your own “Reason Cards” for the test. Here are mine:Reason Cards 1, Reason Cards 2
Textbook Sections
§3.3 (Txt. p.143) Parallel Lines and Transversals
Key Attitudes
Math is about reasoning and justifying.
Key Ideas
Proofs can be thought of as a game. The game pieces are the geometric facts we have been given, or have proved, and the game rules are the rules of logic.
Key Skills
Writing two column proofs.
Turn-In (#17)
Additional Worksheet for Proof Practice
Handouts
No Handouts Posted
Assignment
§3.3 (Txt. p.146) #8-12, 17, 21-23, 27
Three vertices of a rhombus are A(3,2), B(3,7), C(7,4). What is the coordinate of the fourth vertex? What are the equations of the lines that form the sides? What are the equations of the lines that form the diagonals?
Create “Reason Cards”
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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