By A Mystery Man Writer
Rotation Worksheets
Rotating shapes about the origin by multiples of 90° (article)
How to Rotate a Figure about the Origin, Geometry
Rotation matrix - Wikipedia
How to Rotate a shape about the origin 90° counter-clockwise « Math :: WonderHowTo
Solved Question 12 Multiple Choice Worth 5 points) (02.02
Solved Which transformation would take Figure A to Figure B?
Mental rotation - Wikipedia
Rotating shapes about the origin by multiples of 90° (article)