A helicopter hovers 1250 feet above a small island. The figure shows that the angle of depression from the helicopter to point P is 38 degrees. How far off the coast, to the nearest foot, is the island?

step-by-step explanation:

points a and b are equidistant from the desired line, so the line you find by using them will go through point r.

using points other than a and b will give the desired line only if they are equidistant from r. if they are randomly located, the perpendicular line you create will not necessarily go through point r, hence will not be a solution to the problem.

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i need more details

step-by-step explanation:

i think this is a open ended question but i agree with other guy who said you should ask it at english section