Coplanar Lines Sums

graph TB A[Coplanar Lines] --> B[Definition] A --> C[Properties] A --> D[Examples] E[Sums] --> F[Definition] E --> G[Properties] E --> H[Examples] B --> I[Two lines are coplanar if they lie in the same plane] C --> J[If two lines are coplanar, they are either parallel, intersecting, or coincident] D --> K[Line AB is coplanar with line CD] F --> L[Sum is the result of addition] G --> M[Sum of two even numbers is always even] H --> N[Example: 2+2=4]