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9 January, 11:04

In quadrilateral abcd, angle b = 87, angle c = 100, and angle d = 106. find the measure of angle a. a. 67° b. 74° c. 80° d. 87°

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  1. 9 January, 11:58
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    Sum of all the angles of a quadrilateral is 360

    87+100+106 + x = 360

    x = 360-293 = 67

    so A 67 is the answer.
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