A) which method can be used to prove the triangles congruent?

Angle RXQ is congruent to angle SXT because they are vertical angles and vertical angles are congruent now we can prove the triangles are congruent by SAS
triangle RXQ is congruent to triangle SXT

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.