# How do I find the new coordinates of a rotated Cuboid[]?

How do I find the new coordinates of a rotated Cuboid[], obtained through

GeometricTransformation[Cuboid[],RotationTransform[-Pi/4, {0, 0, 1}]]


CoordinateBounds does not seem to work

If you want the transformed cube to be again a region so that you can use CoordinateBounds you should use TransformedRegion as follows:
TransformedRegion[Cuboid[],RotationTransform[-Pi/4, {0, 0, 1}]]

now CoordinatessBounds works properly.