~~NOTOC~~ ====== Plane ====== A **plane** is a 2D space or a flat surface that extends indefinitely. Planes can be represented in 3D space where they are often presented in //Hesse normal form//. ==== Hesse normal form ==== $\displaystyle \hat n = \begin{bmatrix}a\\b\\c \end{bmatrix} \quad P_0 = (x_0,y_0,z_0)$\\ ==== See also ==== * [[article:linear_algebra|Linear algebra]]