Asurveyor needs to measure the distance, ab, across the lake. beginning at e, he locates the midpoint, c, of ae and the midpoint, d, of be. he then measures cd. what is ab?

Since C is the midpoint of AE and D is the midpoint of BE, that simply means CD is the "mid-segment" of the triangle, and the parallel base of AB is simply twice as long as CD.  Bearing in mind that the midsegment is half of the parallel base.

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