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March 29, 2017

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in a triangle, the measure of the first angle is four times the measure of thesecond angle.The measure of the third angle 78 more than the second angle. What is the measure of the first angle?

  • math geometry - ,

    Let x = first angle, the 4x = second angle and 4x + 78 = third angle. For a triangle, they should add up to 180ยบ. Solve for x.

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