Angle depression: The angle of depression is one of the angles in a triangle. is is the angle that lays between a horizontal line from the observer and the line of sight to an object that is below the horizontal line. to calculate a depression angle you have to use the tangent formula, TAN= opposite side/adjacent.
Angle of evolution: The angle of evolution is the angle that is framed by the line of sight and the horizontal line from the observer and object vertical point. it can be calculated by knowing the value of the height and the distance of the object or the triangle. the formula for finding the angle of evolution depends on knowing the information to the measures of the opposite, hypotenuses, and the adjacent side of the right tringle.
