Bitangent

In geometry, 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 as $C$ at these points. That is, $L$ is a tangent line at $P$ and at $Q$ .

This article is issued from Wikipedia. The text is licensed under Creative Commons - Attribution - Sharealike. Additional terms may apply for the media files.