Rotations + Reflections

^R-270 (cw)

(x,y) → (-y, x)

^R180 (ccw)

(x,y) → (-x, -y)

^R90 (ccw)

(x,y) → (-y, x)

^R270 (ccw)

(x,y) → (y, -x)

^R-180

(x,y) → (-x, -y)

^R-90 (cw)

(x,y) → (y, -x)

90°cw/270°ccw

180°cw/cww

90°ccw/270°cw

Write the rule for each rotation.

Write the rule for each rotation.

Write the rule for each rotation.

S

1. (2, 7)

2. (-4, -5)

3. 6, -3)

4. (-5, 3)

5. ^R270

6. ^R180

7. ^R90

1. 72°

2. 72°

3. 216° (find a multiple!)

4. 120°

5. 252°

6. 252°

7. rectangle

8. decagon

9. octagon

10. hexagon (is it a multiple of 300°?)

11. regular octagon (45° does not go into 120)

What is the coordinate rule of the x-axis?

What is the coordinate rule of the y-axis?

What is the coordinate rule of y=x?

What is the coordinate rule of y=-x?

What is the coordinate rule of x=#?

What is the coordinate rule of y=#?

What is the coordinate rule of ^rorigin?

(x,y) → (-x, -y)

1. (2,7)

2. (5,4)

3. (6,3)

4. (-5, 3)

5. ^ry=-x

6. ^ry-axis

7. ^ry=x