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will give brainlest I promise please answer asap please need help please explain I'm tired and need to go to bed so please help thankyou please explain answer​

will give brainlest I promise please answer asap please need help please explain Im tired and need to go to bed so please help thankyou please explain answer class=

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altavistard

Answer:

39°

Step-by-step explanation:

Angle ABD and the 51° angle are complementary:  They add up to 90°.  Subtracting 51°from 90°, we get 39°.  Thus, Angle ABD is 39°.

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