4 ms·

How so? Also, orthogonal lines share a common point of intersection.

• sublinear 2y ago
  prouf?
  • exe34 2y ago
    Let lines A and B be non-parallel. They must intersect, because parallel lines do not intersect, by definition). Orthogonal lines are not parallel, but they must lie in the same plane (by definition of orthogonal). Therefore orthogonal lines must cross at exactly one point.