Aiko stands 5 m from a tree. At that distance, the angle of elevation from the ground to the top of the tree is 80°. Approximately how tall is the tree?
This is the concept of trigonometry, the height of the tree will be given by: tan theta=[opposite]/[adjacent] theta=80 height=h adjacent=5 m hence; tan80=h/5 hence; h=5tan80 h=28.36 m