e/Bitangent

Information
has gloss	eng: In mathematics, a bitangent to a curve C is a line L that touches C in two distinct points P and Q and that has the same direction to C at these points. That is, L is an tangent line at P and at Q.
lexicalization	eng: bitangent
instance of	e/Algebraic curve

Media
media:img	Trott bitangents.png