geometry
posted by Tara .
A student notices that the shadows of a sign and a tree lie among the same line and end at the same point. The height of the sign is 2 meters and its shadow is 3 meters in lenght. The distance from the base of the sign to the base of the tree is 12 meters. How tall is the tree?

12  3 = 9 m.=Length of tree's shadow.
2/3 = x/9
3x = 18
X = 6 m. = Ht. of tree.