If the polygon is rotated 90' clockwise about the origin, the measure of angle W' is

If you are referring to the angle of the polygon, than it is the same, if you are referring to the angle between the initial and final point about the origin, than it's a right angle. If there is a point(x,y) rotated about the origin(0,0), then the new point will be (y,-x).

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this is answer of 144 cubic meters