tell this answer i will make u brainliest
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Adjacent angles are angles that are adjacent to each other. ... From the figure ∠ABD and ∠CBD are adjacent angles from the same vertex. They are also complementary as the sum of the angles is 90∘, i.e. ∠ABD+∠CBD=30∘+60∘=90∘.
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the correct answer is option d
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