Intersection of a Line and a Circle
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A line intersects a circle 0, 1, or 2 times. The number depends on how the radius compares to the perpendicular distance from the center to the line.
Contributed by: Jay Warendorff (March 2011)
Open content licensed under CC BY-NC-SA
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"Intersection of a Line and a Circle"
http://demonstrations.wolfram.com/IntersectionOfALineAndACircle/
Wolfram Demonstrations Project
Published: March 7 2011