Answer:
A. complementary angles
Explanation:
A complementary angle is an angle where the sum of the two angles is 90°.
The sum of angles ABC and DBC is 90°. So It's a complementary angle.
Answer: Complementary
Complementary angles add up to equal 90 degrees. Since the sum of the angle measures of angles ABC and DBC is 90 degrees, the two angles are complementary.
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