What is the missing statement in the proof

The answer is C. Because they need one angle to prove by SAS. That angle is a vertical angles. Hope this helps.

The major difference is that a histogram is only used to plot the frequency of score occurrences in a continuous data set that has been divided into classes, called bins.  bar charts, on the other hand, can be used for a great deal of other types ofvariables  including  ordinal  andnominal  data sets.