adjective
- lying in the same plane
Usage: geometry; mathematics
Examples
- The three points are coplanar and form a triangle.
- All vertices of a square are coplanar by definition.
- These four lines are coplanar since they all lie on the same flat surface.
- The geometry problem asks whether the given points are coplanar.
- Coplanar vectors can be represented in a two-dimensional coordinate system.
- The architect ensured that all the structural beams were coplanar for stability.