given point a 2, 4 on the triangle quadrant 1, where is the point if the triangle is rotated 90 degrees counterclockwise

If the point A (2, 4) is rotated 90 degrees counterclockwise, the new coordinates of the point can be found by interchanging the x-coordinate with the y-coordinate and changing the sign of the new x-coordinate.

So, by rotating point A 90 degrees counterclockwise, the new point would be located at (-4, 2).