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hodyreva [135]
3 years ago
6

What is the measure please help :)

Mathematics
1 answer:
mestny [16]3 years ago
4 0

Answer:

40°

Step-by-step explanation:

m\angle A + m\angle B = 180\degree

(Linear pair angles)

140\degree + m\angle B = 180\degree

m\angle B = 180\degree -140\degree

m\angle B = 40\degree

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