Given point A (2,4) on the triangle in quadrant I, how would you describe the coordinates of the New point when the triangle is rotated 90 degrees clockwise

When the triangle is rotated 90 degrees clockwise, the new point A' will be located in quadrant IV. The x-coordinate of A' will be the negative of the y-coordinate of A, and the y-coordinate of A' will be the positive of the x-coordinate of A.

So, in this case, since A(2,4), the new coordinates A' would be (-4,2).