I am girl
The length of shadow of a 1.5 m long tree on a plane surface is 1 m and at the same time if length of shadow of a tower is 5 m, then find the height of the tower.
In triangle ABC and triangle XYZ if angel a and angel x are acute angles such that cos a =cos x then show that angle A= angle X
ABC is aright angle triangle in which angleA=90°and AB=AC.Show that angleB=angleC