algebra 2

Guy wire. How long is a guy wire reaching from the top of a 21ft pole to a point on the ground 14 ft from the pole?

Thank you.

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  1. 28ft (27.784887978899609016865094082057ft to be exact)

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  2. since when this is drawn it forms a right triangle, we use pythagorean theorem:
    c^2 = a^2 + b^2
    where
    c = hypotenuse
    a and b are base and height of the triangle
    therefore:
    c^2 = 14^2 + 21^2
    c = sqrt (196 + 441)
    c = 25.24 ft

    hope this helps~ :)

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