Planes M and N intersect at line d. Lines a, b, and e are on plane M. Line a is vertical and forms a right angle with line d. Line b is diagonal and goes up and to the right. Line e is at the top of the plane and is close to being horizontal. Line c is on plane N and is goes slightly up and to the right. Why are lines e and c skew lines? They lie in different planes and will never intersect. They lie in the same plane but will never intersect. They lie in different planes but will intersect if a plane is drawn to contain both lines. They lie in different planes and will be parallel if a plane is drawn to contain both lines.