Geometry 9.4 Notes 9­9.notebook
September 09, 2013
Bell Work: IN YOUR NOTEBOOK
1. Explain the words "translation" and "reflection". 2. Clockwise and counterclockwise... Which is which? Describe in pictures and WORDS.
3. If I gave you two points on a coordinate plane, A and B, how would you find the length? 4. Name 4 linear pairs and 2 vertical angles. Sep 02­8:26 PM
Take up homework: the ONE problem from Friday
not 6th hour :(
Answer:
Reminders!!!!!!
­Test on Friday (Ch. 1 info and 9.1, 9.3, 9.4, 9.5)
­Come see me if you're having trouble.. Or Mr. Lawson at lunch. Rm 742
Sep 04­8:59 PM
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Geometry 9.4 Notes 9­9.notebook
September 09, 2013
Fly Swatter
Rotate the pentagon...
­ 90 degrees counterclockwise ­ 180 degrees counterclockwise ­ 270 degrees counterclockwise Sep 07­12:15 PM
Exploration: Groups
Index card and large coordinate plane.
You have ten minutes. Answers for Group Work:
B(1, 4) C(3, 0) D(­2, 3) E (­1, ­2)
B'(­4, 1) C' (0, 3) D'(­3, ­2) E'(2, ­1)
Sep 04­8:59 PM
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Geometry 9.4 Notes 9­9.notebook
Geogebra
September 09, 2013
9.4 Performing Rotations
With a point, showing the distance is the same from origin to point. Segment and triangle.
Sep 04­9:03 PM
9.4 Performing Rotations NOTEBOOK
Clockwise:
Counterclockwise:
Sep 02­8:26 PM
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Geometry 9.4 Notes 9­9.notebook
September 09, 2013
Counterclockwise Rules:
Clockwise rules: 90 degrees (same as 270 degrees counterclockwise)
180 degrees (same as 180 degrees counterclockwise)
270 degrees (same as 90 degrees counterclockwise)
Sep 02­8:43 PM
Use the rules then graph Sep 02­8:46 PM
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Geometry 9.4 Notes 9­9.notebook
September 09, 2013
HOW ARE YOU FEELING?
Sep 04­9:05 PM
Rotation Theorem: a rotation is an isometry
Sep 02­8:47 PM
5
Geometry 9.4 Notes 9­9.notebook
September 09, 2013
What's the value of r?
Sep 02­8:52 PM
Exit Questions
Rotate triangle RST with the given vertices R(­1, 4) S(2, 1) and T(3, ­3) about the origin by the given angle.
1. 90 degrees clockwise 2. 180 degrees counterclockwise Sep 05­10:48 PM
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Geometry 9.4 Notes 9­9.notebook
September 09, 2013
Summarize in Notebook: What did you learn today? What is important about today lesson? Sep 04­9:05 PM
9.4 Homework: pg. 602 # 6, 8, 10, 12, 14, 20, 32, 36
EXPLANATION
Sep 07­6:48 PM
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