1. Rotations

2. Rotation is simply turning about a fixed point.
For our purposes, the fixed point will be the origin
Rotate
90 counterclockwise
about the origin
Rotate
180
about the origin
Rotate 90clockwise about the origin

3. CLOCKWISE
is a right turn.

4. Hands in the air on the wheel.
Left hand is x
Right hand is y

5. Which hand is at 12 o’clock first?
Make a clockwise turn.
Which hand is at 12 o’clock first? X

6. Rotate 90 degrees clockwise.
Change the sign of x
&
switch the order of x and y.

7. Example: Rotate 90 degrees clockwise.

8. Rotate 90° clockwise
3 7
4 -1
1 -3

9. Rotate 90° clockwise

10. COUNTERCLOCKWISE
is a left turn.

11. Hands in the air on the wheel.
Left hand is x
Right hand is y

12. Make a counterclockwise turn.
Which hand is at 12 o’clock first? Y

13. Rotate 90 degrees counterclockwise.
Change the sign of y
&
Switch the order of x and y

14. Example: Rotate 90 degrees counterclockwise.

15. Rotate 90° counterclockwise

16. Rotate 90° counterclockwise

17. Rotating 180 degrees changes the sign of the x and the sign of the y.

18. change the sign of both x & y.
Rotate 180 degrees.
Keep the order
&
change the sign of both x & y.

19. Example: Rotate 180 degrees.

20. Rotate 180°

21. Rotate 180°

22. Practice Does the Brain Good.
-Rotations Practice Sheet
-Quiz Friday
Practice
Finish Classwork

23. Rotations

24. Rotation is simply turning about a fixed point.
For our purposes, the fixed point will be the origin

25. CLOCKWISE
is a _______ turn.

26. Rotate 90 degrees clockwise.
Change the sign of ____
&
switch the order of __ and __.

27. Example: Rotate 90 degrees clockwise.

28. Rotate 90° clockwise

29. Rotate 270° counter clockwise

30. COUNTERCLOCKWISE
is a ______ turn.

31. Rotate 90 degrees counterclockwise.
Change the sign of ____
&
Switch the order of ___ and ___

32. Example: Rotate 90 degrees counterclockwise.

33. Rotate 90° counterclockwise

34. Rotate 270° clockwise

35. change the ______ of both x & y.
Rotate 180 degrees.
Keep the _______
&
change the ______ of both x & y.

36. Example: Rotate 180 degrees.

37. Rotate 180°

38. Rotate 180°