What is the surface area of the square pyramid represented by the net?

So the area of one triangle is (3.5 x 9 ) 31.5  , times that by 4 gives us 126 , now add that to 7 squared which is 126 + 49 . the answer is 175 cm^2

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.