How do you rotate a figure 90 degrees counterclockwise about the origin?

How to Rotate a Figure about the Origin, Geometry

Question Video: Identifying the Image of a Shape after a Rotation about the Origin

rotations about the origin

Find the acute angle of rotation such that the transformed equation 6x^{2}+3xy+4y^{2}+x-y=0 will have no xy term.

A triangle with vertices A (–2, –1), B (–1, 4), and C (5, 0) is rotated 90 degrees counter-clockwise about vertex B. What are the coordinates of the image of vertex A? - Quora

How to determine the points of a triangle rotated 90 degrees counter clockwise

Geometry Rotations Clockwise and Counterclockwise Explained! — Mashup Math

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

How to rotate 90 degrees clockwise about a point, not the origin, say point A (-2, 3) - Quora

How to find the counterclockwise equivalent to a degree?

Solved 6 Figure B 5 4- 3 -1 -2 D -5+ -0 Figure A Which

Investigating Rotations – GeoGebra

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