Category:Tangent Planes

This category contains results about Tangent Planes.
Definitions specific to this category can be found in Definitions/Tangent Planes.

Let $\SS$ be the surface of a solid geometric figure.

Let $Q$ be a point on $\SS$.

A tangent plane to $\SS$ at $Q$ is a plane $P$ which intersects $\SS$ such that:

all straight lines $\LL$ embedded in $P$ that intersect $\SS$ are tangent to $\SS$.