Question

    The angles of a triangle are in the ratio 4:5:3.

    Determine the sum of the smallest and largest angles of the triangle.
    A 90° Correct Answer Incorrect Answer
    B 120° Correct Answer Incorrect Answer
    C 115° Correct Answer Incorrect Answer
    D 125° Correct Answer Incorrect Answer

    Solution

    Let the measure of the angles of the given triangle be '4xo ', '5xo ', and '3xo ', respectively. Sum of angles of a triangle = 4x + 5x + 3x = 180 o So, x = (180 o /12) = 15 o Therefore, the sum of smallest and largest angles of the triangle= 5x + 3x = 8x = 8 X 15 o  = 120 o

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