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Lana71 [14]
3 years ago
9

How can I solve this problem ​

Mathematics
1 answer:
SCORPION-xisa [38]3 years ago
5 0

Answer:

50

Step-by-step explanation:

the angle that they want you to find is complementary to the angle that equals 40. Complementary means they will add up to equal 90. 90-40=50 so ADB = 50

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