1. Station 2: Section 9-3 Rotations
Rigor: Students will rotate figures about a point on and off the coordinate plane.
Relevance: Rotations describe movement.

2. Rotations
A rotation turns all points about a point called the center of rotation.
Rotation is always counterclockwise unless otherwise specified
A Rotation is a rigid transformation such that the image is the same distance from center as pre- image and all points rotate to image by the same angle of rotation.
Function Notation: R (P, mo) (pre-image)
center of rotation angle of rotation

3. Special Rotations in the Coordinate Plane Highlight coordinate rules on pg 385, add 360o Rule

4. Rotation Examples from the Workbook
With tracing paper:
Rotations worksheet
With coordinate rules:
Pg 385 example 3
Pg 387 #5 and 6

5. Does Prime Notation Really Matter?
What transformation would map ABCD onto each square?

6. Rotations in Regular Polygons
A regular polygon has congruent sides, congruent interior angles, and is convex.
You can divide any regular polygon into congruent triangles.
When you rotate a regular polygon about its center, the sides will line up when you rotate it a certain number of degrees called the central angle.

7. Example
Point X is the center of the regular polygon PENTA. What is the image for the given rotations? A) 72o rotation of E about X. B) r (216o, X) ( 𝐸𝑁 )

8. Real Life Example
The London Eye observation wheel takes 30min to make a complete rotation. What is the angle of rotation of a car after 5 minutes? How many minutes would it take for the car to rotate 270o?

9. 9-3 Standard Assignments
Primary Assignment: join.quizizz.com
9-3 Codes:
Period 1: (due 7am)
Period 3: (due 7am)
Period 7: (due 7am)
Secondary Assignment:
Wkbk pg 389 #7 – 10; pg 390 #1, 4, 5, 7 (must show work for multiple choice)

10. 9-3 Honors Assignments Primary Assignment: join.quizizz.com
9-3 Codes: (due 7am)
Period 2:
Period 4:
Period 6:
Secondary Assignment:
Workbook pg 389 #5 – 10; pg #1, 4, 5, 7 (must show work for multiple choice)