Estimate Distance Calculator
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Estimate Distance Calculator

You are driving into St. Louis, Missouri, and in the distance you see the famous Gateway to the West arch. This monument rises to a height of 192 meter . You estimate your line of sight with the top of the arch to be 2.0 degree above horizontal.

Approximately how far in kilometer are you from the base of the arch?

HOW TO USE: Enter new number . Answer will be automatic

Tangent of °
=
m, meter

m, meter, or km

If the Height and base distance are given, Angle can be calculated using arcTan. When entering the number do not include the comma sign , because of NaN error message.

if NaN or infinity appears in the answer box it is normal because the calculation is done automatically as soon as you enter data in one of the input box. Continue entering the data in the second input text box and the NaN or infinity will be replaced by the answer.

Angle is °
=
meter

meter, distance

Formula Recall:

Tangent of an angle = opposite side of an angle divided by the adjacent side of an angle.

Angle = arcTan of opposite side divided by the adjacent side

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