Multiple choice general knowledge math & puzzles A straight line that touches a curve but continues on without crossing it is called: Normal Latus Rectum Asymptote Tangent Reveal answer Fill a bubble to check yourself D Correct answer Explanation A tangent is a line that touches a curve at a single point without crossing it at that point. A normal is perpendicular to the tangent, an asymptote is a line the curve approaches at infinity, and a latus rectum is a chord through a focus.