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Section 12.2: Complementary and Supplementary Angles — Practice Questions

  1. 1. Two angles have measures of $28°$ and $62°$. How are these angles classified?

    • A. Complementary
    • B. Supplementary
    • C. Neither
    • D. Equal
  2. 2. An angle pair consists of angles measuring $135°$ and $45°$. What is the correct classification for this pair?

    • A. Complementary
    • B. Supplementary
    • C. Neither
    • D. Acute
  3. 3. An angle measures $47°$. What is the measure of its complementary angle in degrees? ___

  4. 4. If an angle has a measure of $115°$, what is the measure of its supplementary angle in degrees? ___

  5. 5. Consider two angles with measures of $80°$ and $20°$. Which term best describes their relationship?

    • A. Complementary
    • B. Supplementary
    • C. Neither
    • D. Obtuse
  6. 6. Angles $\angle P$ and $\angle Q$ are complementary. If the measure of $\angle P$ is $48°$, what is the measure of $\angle Q$ in degrees? ___

  7. 7. Two non-adjacent angles, $\angle X$ and $\angle Y$, are supplementary. If the measure of $\angle X$ is $135°$, what is the measure of $\angle Y$ in degrees? ___

  8. 8. Which of the following pairs of angles are complementary?

    • A. $50°, 50°$
    • B. $25°, 65°$
    • C. $90°, 90°$
    • D. $40°, 140°$
  9. 9. Two angles are supplementary. Which statement must be true, regardless of their position?

    • A. The angles must be adjacent.
    • B. The angles must both be right angles.
    • C. The sum of their measures is $180°$.
    • D. The sum of their measures is $90°$.
  10. 10. An angle in one triangle measures $72°$. An angle in a separate rectangle is supplementary to it. What is the measure of the angle in the rectangle? ___