Question

given point A (2, 4) on triangle quadrant I, where the is new point if the triangle is rotated 90 degrees counterclockwise

Answer 1

To rotate a point 90 degrees counterclockwise, we can switch the x and y coordinates and then negate the new x coordinate.

Given point A (2, 4), if we rotate it 90 degrees counterclockwise, the new point will be (-4, 2).