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Inga [223]
3 years ago
7

Please explain how you got your answer! ​

Mathematics
2 answers:
Alla [95]3 years ago
4 0

Answer: b =50°

Step-by-step explanation:

The angles on a straight line =180°

180° = 50°+90°+b

180°-50°-90°=b

50° = b

prisoha [69]3 years ago
3 0

Answer:

Step-by-step explanation:

∠b + ∠a + 50° = 180°

∠b + ∠90 + 50° = 180°

∠b = 180° - 90° - 50° = 40°

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