Answer :
When two triangles are similar, this means that their corresponding sides have equal ratios. In this example, the ratio 2:3 is kept constant. By using ratioand proportion,we could find the altitude of the smaller roof, denoted as x, by
2/3 = x/6.5
x = 4.33 feet
2/3 = x/6.5
x = 4.33 feet