cutiepiej2008 cutiepiej2008

26-03-2021
Mathematics

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mhanifa mhanifa

29-03-2021

Answer:

A. 91°

Step-by-step explanation:

∠A ≅ ∠B as vertical angles
∠B + 47° + 42° = 180° (straight angle)

∠B = 180° - 89° = 91°
∠A = ∠B = 91°

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