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User Hongye Sun
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1 Answer

1 vote

Answer:

B

Explanation:


m\angle ABZ+m\angle ZBC=m\angle ABC \\ \\ 12x+55=16x+15 \\ \\ 4x=40 \\ \\ x=10 \\ \\ \therefore m\angle ABZ=120^(\circ)

User JuanR
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