1. Problem of the Day 1.) Graph triangle ABC
A (-1, 2), B (-2, 5), and C (3, -1)
2) Reflect ABCD over the y axis and draw A’B’C’
3) Translate A’B’C’ right 3 and down 7.
4) What are the coordinates of A”B”C”?

2. 4. no 10. 12. 14. 16. 24. 6. yes 8.yes 18. BCDEHIKOX 20. y axis
Homework Answers:
4. no
6. yes
8.yes
18. BCDEHIKOX
20. y axis
22. x axis
26. (−x, −y)
28. (y, x)
24.

4. C II I III IV Each quadrant = 90˚
COUNTER-CLOCKWISE goes in the order of the quadrants
CLOCKWISE goes the direction clock hands move C II I
Each quadrant = 90˚
III IV

6. Example 2

7. Lets get some rules for ROTATIONS
Flip paper upside down. Coordinates become (-x,-y)
When an object rotates 180˚ _______________________________________________
Example: Rotate Z (-2, 3) 180˚ about the origin __________
When rotating 90˚ COUNTERclockwise__________________________________
_________________________________
Example: Rotate Z (-2, 3) 90˚ counterclockwise about the origin __________
When rotating 90˚ clockwise__________________________________
Example: Rotate Z (-2, 3) 90˚ clockwise about the origin__________
Rotate paper CLOCKWISE.
Coordinates become (-y,x)
Rotate paper counter-clockwise.
Coordinates become (y,-x)

8. Exit Ticket 1.) Graph triangle ABCD A (-6, 5), B (-4, 1), and C (0, 2)
2) Rotate ABC 90˚ counterclockwise about the origin. Draw A’B’C’
3) What are the new coordinates?