1.   The angles shown are complementary. Find the measure of .
   
    A. 145 B. 90
    C. 55 D. 180
    Hint

  2.   Classify the given pair of angles.
   
    A. The angles are complementary angles because their measures have a sum of 180°. B. The angles are complementary angles because their measures have a sum of 180°.
    C. The angles are supplementary angles because their measures have a sum of 90°. D. The angles are supplementary angles because their measures have a sum of 180°.
    Hint

  3.   Classify the given angle.
   
    A. complementary B. right
    C. obtuse D. acute
    Hint

  4.   Classify the given angle.
   
    A. acute B. complementary
    C. right D. obtuse
    Hint

  5.   The angles shown are supplementary. Find the measure of M.
   
    A. 229° B. 119°
    C. 29° D. 39°
    Hint