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17 January, 23:59

In a quadrilateral A B C D angle d is

equal to 150° and angle a = angle b=angle c

Eind angle A, angle b, and angle c

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Answers (1)
  1. 18 January, 01:44
    0
    Step-by-step explanation:

    Let ∠A = x

    Therefore, ∠A = ∠B = ∠C = x

    The sum of all angles of a quadrilateral is 360

    ∠D + ∠A + ∠B + ∠C = 360

    150 + x + x + x = 360

    150 + 3x = 360

    3x = 360 - 150

    3x = 210

    x = 210/3

    x = 70

    ∠A = ∠B = ∠C = x = 70°
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