Answer:
B. Supplementary Angles
Step-by-step explanation:
0. The unknown angle (x+3) and 27 degrees are on a straight line.
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1. The sum of angles on a straight line is 180 degrees.
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2. Two or more angles are said to be supplementary if they add up to 180 degrees.
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3. Therefore, the 27 degree angle and the unknown angle are ,Supplementary, since Supplementary angles add up to 180 degrees.