Chat with our AI personalities
Things in the same plane are coplanar.
If you mean the plural of plane, it is planes. If you mean the spelling of another word that is pronounced the same way, it is plain.
I think "parallel" is the word you're looking for?
If they are in the same plane, then they share a common plane. Did you mean to say common point. If that's the case where they are in the same plane, but do not share a common point, then they are parallel lines.
Points or lines that lie on the same plane are coplanar.