Symmetric Equation

Symmetric Form

$R^2$

$\frac{x-x_0}{m_1}=\frac{y-y_0}{m_2}=t$

$R^3$

There is no symmetric one for planes $\frac{x-x_0}{m_1}=\frac{y-y_0}{m_2}=\frac{z-z_0}{m_3}=t$