A planar graph has,
- $\large\color{maroon}{\text{k}}$ connected components
- $\large\color{maroon}{\text{v}}$ vertices
- $\large\color{maroon}{\text{e}}$ edges
If the plane is divided into $\large\color{maroon}{\text{r}}$ regions then, what is the retation between $\large\color{maroon}{\text{k}}$ , $\large\color{maroon}{\text{v}}$ , $\large\color{maroon}{\text{e}}$ and $\large\color{maroon}{\text{r}}$ ?