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29-06-2016
Mathematics

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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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Аноним Аноним

29-06-2016

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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31-05-2019

Answer: its A

Step-by-step explanation:

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