Difference between revisions of "Externally tangent"
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| − | + | Two [[smooth]] [[closed curve]]s are said to be '''externally tangent''' if they are tangent and each lies on the exterior of the other. Equivalently, they [[intersect]] at a [[point]] <math>P</math>, at this point they have a common [[tangent line]], and locally they lie on different sides of this line. | |
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Latest revision as of 15:38, 28 April 2007
Two smooth closed curves are said to be externally tangent if they are tangent and each lies on the exterior of the other. Equivalently, they intersect at a point 
, at this point they have a common tangent line, and locally they lie on different sides of this line.
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