Trigonometric relations: cos(A) = d/z sin(A) = f/ tan(A) = f/d = /x 1g An object a distance, d, away having a full height, h. f is the height relative to eye level and g is the eye level height of the observer. held at eye level and the top of the stick overlaps with the top of the object regarding the observer's line of sight. A stick with a length, 1, held a distance, x, away from eye level. The bottom of the stick is Since l/x = f/d due to the similar triangles formed, the angle, A, can easily be determined as well as the height of the object, f, relative to eye level, g. The full height of the object is then, h = f+g What is the formula to compute the angle "A", using the object distance and its height relative to

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