Key Ideas
- Rotation about the origin
When point is rotated 90 degrees counterclockwise about the origin, point (x,y) becomes (-y,x).
Solving the Question
We're given
- (4,0) rotated 90 degrees counterclockwise about the origin
Make the y-coordinate negative:
(4,0)
Switch around the coordinates:
(0,4)
Answer
(0,4)
