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    Mathematics
    Grade9
    Easy

    Question


    Find AB, If BD is perpendicular bisector.

    1. 45
    2. 35
    3. 40
    4. 50

    hintHint:

    In an isosceles triangle only, the perpendicular from the vertex of the triangle cuts the base in equal(i.e., a perpendicular bisector).

    The correct answer is: 45

      Step by step solution:
      Since triangle ABC is an isosceles triangles,
      9x = 5x + 20
      rightwards double arrow4x = 20
      rightwards double arrowx = 5
      Therefore, AB = 9x = 9 x 5 = 45
      Hence, option(b) is the correct option.

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