http://www.emsc.nysed.gov/osa/mathei/mathe.../gr8bk2math.pdf id like to know how to do # 31. Do you just visually divide the mountain up?? It doesnt say use a ruler, so measurment is out of the question. Strings are not allowed. The only way I can think of doing it is by dividing the mountain up into segments and multiplying it by 4, excluding the first bold segment.