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11) If AB//DC and CBE = DBC, find the value of x using the diagram given. A 50⁰ B -E​

11) If AB//DC and CBE = DBC, find the value of x using the diagram given. A 50⁰ B-example-1

1 Answer

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Angles DCB and CBE are alternate interior angles, so they are equal. CBE = 50, DBC = CBE => DBC = 50. DBE = 50 + 50 = 100; DBA = x = 180 - 100. x = 80.

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User Darren Zou
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