Given point A (2,4) on the triangle and quadrant l, where is the new point of the triangle is rotated 90° counterclockwise?
To rotate a point 90° counterclockwise, we can switch the x and y coordinates and then flip the sign of the new x coordinate.
Given point A (2,4), to rotate it 90° counterclockwise:
New x coordinate = -4
New y coordinate = 2
Therefore, the new point of the triangle after rotating point A 90° counterclockwise is (-4,2).