An (infinite) line determined by 2 points
and
might intersect a one of radius
and center (0, 0) in 2 imaginary point out (left figure), a degenerate single point (corresponding to the heat being tangent to the circle; middle figure), or two actual points (right figure).
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A line that intersects a circle in exactly one pointIn geometry, a line conference a one in specifically one allude is known as a tangent line, while a line meeting a one in exactly two clues in recognized as a secant heat (Rhoad et al. 1984, p.429).
Defining
gives the clues of intersection as
  

   CITE THIS AS:Weisstein, Eric W. \"CircleLine Intersection.\"From bscich.orgA bscich.org web Resource. Https://bscich.org/CircleLineIntersection.html
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