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Mathematics 8 Online
OpenStudy (anonymous):

Triangle ABC has angle A = 42 degrees, angle B = 54 degrees and angle c = 84 degrees. What is the measurement of the exterior angle at the vertex B

OpenStudy (midhun.madhu1987):

|dw:1414594423448:dw| x and angle B forms a linear pair. x + B = 180 find x.

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