Two poles of height 'a' metres and 'b' meters are 'p' meters apart. Prove that the height of the point of intersection of the lines joining the top of each pole to the foot of the opposite pole is given by `(ab)/(a+b)` meters.

Answer

(ii) Similarity of triangles .
(iii) Trees are helpful to maintain the balance in the environment. They should saved at any cost.