Height of Object from Angle of Elevation Using Tangent

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You can find the height of an object from the angle of elevation and the distance along the ground from the obsever to the foot of the object.

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In this Demonstration the object is an obelisk.

The tangent of an angle in a right triangle is the length of the opposite divided by the length of the adjacent side. In this case, . Therefore the height of the obelisk is given by .

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Contributed by: S. M. Blinder (May 2018)
Open content licensed under CC BY-NC-SA


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