Rotating a quadrilateral 90 degrees about the origin involves exchanging its coordinates and negating one of them.
If the quadrilateral ARMY has vertices represented by points A(x_A, y_A), R(x_R, y_R), M(x_M, y_M), and Y(x_Y, y_Y),
the new coordinates after a 90-degree counterclockwise rotation about the origin would be:
A'(-y_A, x_A)
R'(-y_R, x_R)
M'(-y_M, x_M)
Y'(-y_Y, x_Y)
These new coordinates represent the vertices of the rotated quadrilateral ARMY.
Question
Quadrilateral ARMY is rotated 90 degrees about the origin. Draw the image of this rotation.