find the coordinates of the image of a triangle with vertices A(0,2) B(-2,0) C(6,-4) for a rotation of 90 degrees counterclockwise about the origin

Answer 1

90 counterclockwise means (x,y) becomes (-y,x)

(0,2) becomes (-2,0)

(-2,0) becomes (0,-2)

(6,-4) becomes (4,6)