Coplanarity Of Two Lines

Concept: Two lines are coplanar if:

Step 1: Direction vectors.


Step 2: Points.


Step 3: Apply condition.

Concept: For intersection → coordinates must satisfy both lines.

Step 1: Parametric form of first line

Step 2: Parametric form of second line

Step 3: Equate coordinates From : From : Substitute :

Step 4: Use -coordinate Conclusion