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If two angles are complementary, their sum is:

  • A.45°
  • B.90°
  • C.180°
  • D.360°

Answer: B

Complementary angles add to a right angle.

\[ \angle A + \angle B = 90^{\circ} \]

Angles adding to 180° are supplementary instead - the pair most often confused with this one.

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