How to rotate 90 degrees clockwise about a point, not the origin

How to Rotate a Figure 90 Degrees Clockwise About a Point [Solved]

2D Rotations

Rotating shapes about the origin by multiples of 90° (article)

Rotation Rules (Explained w/ 16 Step-by-Step Examples!)

How to Rotate a shape about the origin 90° counter-clockwise « Math :: WonderHowTo

Figure P was rotated about the origin (0,0) by 90 degrees counterclockwise. Which figure is the image of

3 Ways to Rotate a Shape - wikiHow

Rotating shapes about the origin by multiples of 90° (article)

geometry - Rotating rectangle 90 degrees clockwise - Mathematics Stack Exchange