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13 August, 23:25

Abcd is a quadrilateral. three of the angles of abcd measure 100°, 87°, and 106°, respectively. find the measure of the missing angle.

a. 67°

b. 74°

c. 80°

d. 87°

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Answers (1)
  1. 14 August, 00:58
    0
    A quadrilateral in total is 360 degrees.

    (x = the missing length)

    100 + 87 + 106 + x = 360

    293 + x = 360

    -293 - 293

    x = 67 degrees.

    The answer to your question is option A, 67 degrees.
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