geometry

if two parallel lines are cut by a transversal and two interior angles are 3x and x sqaured. how do you solve for x?

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asked by Laura
  1. x^2 + 3x = 180o.
    x^2 + 3x-180 = 0. Factor it.

    -180 = -12*15. -12 + 15 = 3 = B.
    (x-12)(x+15) = 0.
    X = 12.
    X = -15.
    Use positive value of X:
    X = 12.
    X^2 = 144o.
    3x = 36o.

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    posted by Henry

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