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.
Spend?
yes it is.
The correct usage would be "on the same plane". Plane as in "plate", "table" or "page". These are nouns. "Plain" is an adjective.
Things in the same plane are coplanar.
The word "monogrammer" can be a blend word of "monogram" and "marker".
plane, plain, plain
The blend word of "city" and "landscape" is "cityscape."
The word blend has one syllable.
There is no such word as caplonar.If you meant coplanar points, then these are points in the same plane.
The word you are looking for is "assimilate." It means to blend in or adapt to a new environment or culture.
The word blend of nickel and cadmium is "nicad."
Lines in the same plane that do not intersect Lines in the same plane that do not intersect Lines in the same plane that do not intersect Lines in the same plane that do not intersect