1.   In the figure, °. Find
   
    A. 30° B. 45°
    C. 120° D. 90°
    Hint

  2.   Classify the angle whose measure is 100°.
    A. straight B. acute
    C. right D. obtuse
    Hint

  3.   The sum of the measures of the angles of a regular octagon is 1,080. Find the measure of one of its angles.
    A. 135° B. 120°
    C. 90° D. 108°
    Hint

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

  5.   Find the sum of the measures of the interior angles of the polygon.
   
    A. 1080° B. 540°
    C. 360° D. 720°
    Hint