1.   Which segment is perpendicular to ?
   
    A. B.
    C. D.
    Hint

  2.   Which pair of lines are skew?
   
    A. B.
    C. D.
    Hint

  3.   Which pair of lines are parallel?
   
    A. B.
    C. D.
    Hint

  4.   If m || h and m1 = 40°, find m5.
   
    A. 80° B. 140°
    C. 20° D. 40°
    Hint

  5.   If m || h, m3 = (18x-12)° and m7 = (6x + 63)°, find m3.
   
    A. 63° B.
    C. 99° D. 10°
    Hint