1. Happy Last Day of January!
Today’s Agenda (1/31)
Happy Last Day of January!
Check HW/HW Questions
What is a Rotation?
Math Short
Partner Activity
TenMarks 3rd Period.

2. I can draw rotations in the coordinate plane.

3. If the images to the right describe a Rotation, in your own words, define rotation:

4. Vocabulary!
Center of Rotation
Angle of Rotation
Direction of Rotation

5. Rotations on a Coordinate Plane
(𝒙,𝒚)→( , )

6. Example 1:
Triangle DEF has vertices D(–2, –1), E(–1, 1), and F(1, –1). Graph ΔDEF and its image after a rotation of 270˚ about the origin?

7. Example 2:
Hexagon DGJTSR is shown below. What is the image of point T after a 90 counterclockwise rotation about the origin?

8. Example 3:
Triangle PQR is shown below. What is the image of point Q after a 180° counterclockwise rotation about the origin?

9. Example 4:
Find the image that represents the rotation of the polygon about the origin. Then graph the polygon and its image.

10. Example 4:
Find the image that represents the rotation of the polygon about the origin. Then graph the polygon and its image.

11. Partner Activity Choose a partner and sit next to them.
Make sure one of you has paper “A” and one of you has paper “B” (put both names on both papers)
Work through the 3 problems that are not done on YOUR paper.
Your partner has the answer, check with them and see how you did. Help each other out if you are lost.
When finished, start your HW: 9.3 (purple packet) #1-5