aim#2 :Rotations

How Do We Graph Rotations?

Definition of a Rotation
- A rotation is when a geometric figure is turned around a single point
Examples:

Describing a Rotation
1) Angle of rotation
2) A direction ( clockwise or counter clockwise, do as directed)
3) A center of rotation

- When graphing rotations you can also switch the coordinates accordingly, depending on the degree of the rotation :
 90 degrees = ( x,y) -> (-y,-x)
180 degrees = (x,y) -> (-x,-y )
270 degrees = ( x,y) -> (y,-x)

An example problem is: What is the image of the coordinates (-4,-5) under the transformation ry-axis?
                                             Answer : (4,-5)