Describe the cross section

Ibelieve this would be an obtuse trapezoid ie a quadrilateral with only 2 sides parallel and in this case with one obtuse angle ie an angle greater than 90 degrees and less than 180 degrees

Ifound this on google “a skewed (non-symmetric) distribution is a distribution in which there is no such mirror-imaging. a "skewed right" distribution is one in which the tail is on the right side. a "skewed left" distribution is one in which the tail is on the left side. the above histogram is for a distribution that is skewed right.” i hope this you for what your looking for