Answer: U': (0, 9)
V': (0, 3)
W': (-9, 6)
Explanation:
In a 90 degree clockwise rotation about the origin for this triangle, the x and y coordinates of the triangle's edges are swapped, but the y-coordinates are negated. This is because the transformation is happening over the x-axis, where the y-values will be changing signs while the x-values will still have the same signs.
U: (-9, 0) ==> (0, -9) ==> U': (0, 9)
V: (-3, 0) ==> (0, -3) ==> V': (0, 3)
W: (-6, -9) ==> (-9, -6) ==> W': (-9, 6)